CN219576645U - Power supply circuit, chip and electronic equipment - Google Patents

Abstract

The application discloses a power supply circuit, a chip and electronic equipment, wherein the power supply circuit comprises a power supply voltage generation module and a power supply generation module powered by a first external power supply; the first output end of the power supply generating module is connected with the power supply input end of the power supply voltage generating module so as to output a first voltage signal to the power supply voltage generating module, wherein the first voltage signal is used for supplying power to the power supply voltage generating module; the power supply voltage generation module is provided with a main input end for receiving a reference voltage signal, and an output end of the power supply voltage generation module is connected with the module to be powered so as to output the power supply voltage signal to the module to be powered. The power supply circuit has a strong inhibition effect on external power supply interference, so that the condition that a power supply voltage signal output to a module to be powered is unstable when the external power supply voltage fluctuates greatly is avoided, the reliability of the power supply circuit is improved, and the module to be powered can work stably.

Description

Power supply circuit, chip and electronic equipment

Technical Field

The present application relates to the field of circuit technologies, and in particular, to a power supply circuit, a chip, and an electronic device.

Background

The power supply generating circuit is also called a power supply circuit, is an indispensable circuit unit in modern electronic products and chips, and the power supply voltage generating unit inside the power supply generating circuit can generate a power supply voltage which is adapted to a unit to be powered on based on a reference voltage so as to power the unit to be powered on.

The conventional power generation circuit is powered by an external power supply, and when a small range of fluctuation occurs in the external power supply voltage, the internal structure of the power generation circuit can suppress the fluctuation.

However, the internal structure of the power supply generating circuit in the related art has limited capability of suppressing the fluctuation of the external power supply voltage, and if the external power supply voltage fluctuates greatly, the power supply voltage provided to the unit to be powered by the power supply generating circuit is liable to be unstable, thereby affecting the operation of the unit to be powered.

Disclosure of Invention

In view of the above, the present utility model provides a power supply circuit, a chip and an electronic device, so as to solve the above technical problems.

In a first aspect, the present utility model provides a power supply circuit comprising a supply voltage generation module and a power generation module powered by a first external power source;

the first output end of the power supply generating module is connected with the power supply input end of the power supply voltage generating module so as to output a first voltage signal to the power supply voltage generating module, wherein the first voltage signal is used for supplying power to the power supply voltage generating module;

The power supply voltage generation module is provided with a main input end for receiving a reference voltage signal, the output end of the power supply voltage generation module is connected with the power supply module to output a power supply voltage signal to the power supply module, the power supply voltage signal is generated by the power supply voltage generation module based on the reference voltage signal, and the power supply voltage signal is used for supplying power to the power supply module.

The power supply circuit has a strong inhibition effect on external power supply interference, so that when the external power supply voltage fluctuates greatly, the unstable condition of a power supply voltage signal output to the module to be powered is avoided, the reliability of the power supply circuit is improved, and the module to be powered is ensured to work stably.

In a second aspect, the present application further provides a chip, including the power supply circuit described above.

In a third aspect, the present application further provides an electronic device, including a device main body, and the chip or the power supply circuit provided in the device main body.

According to the power supply circuit, the first voltage signal output by the power supply generating module is used for supplying power to the power supply voltage generating module, and then the power supply voltage generating module is used for generating the power supply voltage signal based on the reference voltage signal to supply power to the module to be powered.

These and other aspects of the application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a general schematic diagram of a related art power generation circuit;

fig. 2 is a schematic diagram of an application scenario of a power supply circuit provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a power supply circuit according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a power generation module according to an embodiment of the present application;

FIG. 5 is another schematic diagram of a power supply circuit provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of a further configuration of a power supply circuit provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of a power supply structure of a filtering module according to an embodiment of the present application;

FIG. 8 is a schematic diagram of another power supply structure of a filtering module according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a connection structure of a filtering module according to an embodiment of the present application;

FIG. 10 is a schematic diagram of another connection structure of a filtering module according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a power supply voltage generating module according to an embodiment of the present application;

fig. 12 is another schematic diagram of a power supply voltage generating module according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.

In order to enable those skilled in the art to better understand the solution of the present application, the following description will make clear and complete descriptions of the technical solution of the present application in the embodiments of the present application with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the embodiments of the present application, it should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In describing embodiments of the present application, words such as "exemplary" or "such as" are used to mean illustrated, described, or described. Any embodiment or design described as "exemplary" or "such as" in an embodiment of the application is not necessarily to be construed as preferred or advantageous over another embodiment or design. The use of words such as "example" or "such as" is intended to present relative concepts in a clear manner.

In addition, the term "plurality" in the embodiments of the present application means two or more, and in view of this, the term "plurality" may be understood as "at least two" in the embodiments of the present application. "at least one" may be understood as one or more, for example as one, two or more. For example, including at least one means including one, two or more, and not limiting what is included, e.g., including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A and B and C, may be included.

It should be noted that, in the embodiment of the present application, "and/or" describe the association relationship of the association object, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/", unless otherwise specified, generally indicates that the associated object is an "or" relationship.

It should be noted that in embodiments of the present application, "connected" may be understood as electrically connected, and two electrical components may be connected directly or indirectly between the two electrical components. For example, a may be directly connected to B, or indirectly connected to B via one or more other electrical components.

Before describing the power supply circuit, the chip and the electronic device of the present application, related background information of the embodiments of the present application is first described.

The power supply generating circuit is an indispensable circuit unit in modern electronic products and chips, in the related art, the power supply generating circuit is powered by an external power supply, and the power supply voltage generating unit inside the power supply generating circuit generates a power supply voltage adapted to a unit to be powered based on a reference voltage so as to power the unit to be powered.

Since the power supply voltage affects the response speed, function, performance, etc. of the unit to be powered, in order to ensure that the power supply voltage generated by the power supply generating circuit can be relatively stable when the external power supply fluctuates, the current power supply generating circuit generally adopts a general structure as shown in fig. 1.

As shown in fig. 1, the power supply generating circuit 110 includes a reference source 1101 and a power supply voltage generating circuit 1102, the reference source 1101 and the power supply voltage generating circuit 1102 are powered by the external power supply 120, the reference source 1101 generates a reference voltage signal and outputs the reference voltage signal to the power supply voltage generating circuit 1102, and the power supply voltage generating circuit 1102 generates a power supply voltage signal with a magnitude lower than a power supply voltage value of the external power supply 120 based on the reference voltage signal, and drives the unit to be powered 130 to work through the power supply voltage signal, thereby powering the unit to be powered 130.

Based on the principle and characteristics of the reference source 1101 and the supply voltage generating circuit 1102, the internal structure of the supply voltage generating circuit 110 has a supply voltage suppressing effect, that is, the fluctuation of the voltage of the external power supply 120 is suppressed at the supply voltage signal, so that the supply voltage of the unit to be supplied 130 is kept relatively stable, and the functions and performances thereof are ensured.

However, the internal structure of the power supply generating circuit 110 is limited in its ability to suppress power supply fluctuations, and if the voltage of the external power supply 120 fluctuates greatly, the power supply voltage output to the unit to be supplied 130 is liable to be unstable, thereby affecting the functions and performance of the unit to be supplied 130.

Based on this, the embodiment of the application provides a power supply circuit, a chip and an electronic device, which are respectively described in detail below.

Referring to fig. 2, fig. 2 is a schematic diagram of an application scenario of a power supply circuit provided in an embodiment of the application, where the power supply circuit 200 includes a power supply voltage generating module 220 and a power supply generating module 210 powered by a first external power supply 300.

The first output terminal of the power generation module 210 is connected to the power input terminal of the power supply voltage generation module 220 to output a first voltage signal to the power supply voltage generation module 220, where the first voltage signal is used to supply power to the power supply voltage generation module 220.

The power supply voltage generating module 220 is configured with a main input end for receiving a reference voltage signal, and an output end of the power supply voltage generating module 220 is connected with the module 400 to be powered to output a power supply voltage signal to the module 400 to be powered, wherein the power supply voltage signal is a signal generated by the power supply voltage generating module 220 based on the reference voltage signal, and the power supply voltage signal is used for supplying power to the module 400 to be powered.

The first external power supply 300 shown in fig. 2 may be any power supply circuit or power supply device that may output a power supply voltage having a magnitude that may be determined according to an operating voltage of the power generation module 210. For example, the power generation module 210 may be driven to operate by 5V dc, and the power supply voltage provided to the power generation module 210 by the first external power supply 300 is a dc voltage with a magnitude of 5V.

It is understood that the module to be powered 400 may operate based on the power supply voltage signal to implement the corresponding function, and the module to be powered 400 may be a core functional circuit of a chip or a device, where the core functional circuit may be an analog circuit or a digital circuit, and the module to be powered 400 includes, but is not limited to, a single chip microcomputer and its peripheral circuits, an operational amplifier circuit, an oscillating circuit, a modem circuit, a logic gate circuit, a combinational logic circuit, a sequential circuit, and the like.

Although only one module to be powered is shown in fig. 2, it will be understood that in some other application scenarios, the power supply circuit 200 may be further connected to more modules to be powered than shown in fig. 1, so as to provide, for each module to be powered, a power supply voltage adapted to an operating voltage of the module to be powered, so as to drive the module to be powered to operate, and implement a corresponding function thereof.

Next, taking an application scenario shown in fig. 2 as an example, a power supply circuit provided by the present application will be described in detail.

With continued reference to fig. 2, the power generation module 210 may be any conventional power generation circuit, and the specific structure of the power generation module 210 may refer to the general structure of the power generation circuit shown in fig. 1.

As can be seen from the above description of the power generation circuit in the related art, the power generation module 210 has a certain capability of suppressing the fluctuation of the external power supply voltage, that is, the fluctuation of the voltage supplied to the power generation module 210 by the first external power supply 300 is suppressed at the first voltage signal, so that the output first voltage signal remains relatively stable.

In the embodiment of the present application, in order to cope with larger voltage fluctuation of the first external power supply 300, it is ensured that the module to be powered 400 can stably operate to achieve its function, the first output end of the power supply generating module 210 is connected to the power input end of the power supply voltage generating module 220, and the first voltage signal generated by the power supply generating module 210 is provided to the power supply voltage generating module 220 through the power input end, so as to drive the power supply voltage generating module 220 to operate.

The supply voltage generating module 220 is configured with a main input for receiving a reference voltage signal, and the supply voltage generating module 220 may generate a supply voltage signal based on the reference voltage signal to supply power to the module to be supplied 400.

In an embodiment of the present application, the supply voltage generating module 220 may be any existing linear voltage stabilizing source, direct Current-Direct Current (DC-DC) converter, or other types of circuits that can generate a specific output voltage based on a reference voltage and provide Current driving.

It will be appreciated that the supply voltage generating module 220 also has a certain capability of suppressing the fluctuation of the external power supply voltage, and thus, even if the fluctuation of the first external power supply 300 is large, it is possible to ensure that a stable supply voltage signal is output to supply power to the module to be supplied 400 based on the dual suppression capability of the power supply generating module 210 and the supply voltage generating module 220.

In the power supply circuit provided by the embodiment of the application, the first voltage signal output by the power supply generating module 210 is used for supplying power to the power supply voltage generating module 220, and then the power supply voltage generating module 220 is used for generating the power supply voltage signal based on the reference voltage signal to supply power to the module to be supplied 400, because the power supply generating module 210 has a certain capability of inhibiting the fluctuation of the voltage of the first external power supply 300, the first voltage signal output by the power supply generating module 210 is relatively stable, and then the first voltage signal is used for supplying power to the power supply voltage generating module 220, so that the influence of the voltage fluctuation of the first external power supply 300 on the power supply voltage generating module 220 can be reduced, and the stability of the power supply voltage signal is improved.

On this basis, the power supply voltage generating module 220 also has a certain capability of inhibiting the fluctuation of the external power supply voltage, and the external power supply voltage specific to the power supply voltage generating module 220 is the first voltage signal, so that even if the fluctuation of the first external power supply 300 is large, the fluctuation of the first voltage signal exists, the power supply voltage generating module 220 can inhibit the fluctuation, thereby ensuring the stability of the power supply voltage signal, improving the capability of the power supply circuit 200 for resisting the interference of the external power supply, greatly improving the inhibiting effect of the power supply circuit 200 on the fluctuation of the external power supply voltage, and improving the reliability of the power supply circuit 200, thereby ensuring that the module 400 to be supplied can stably work.

Referring to fig. 3, fig. 3 is a schematic diagram of a power supply circuit according to an embodiment of the application, and in some embodiments of the application, a second output terminal of the power generation module 210 is connected to a main input terminal of the power supply voltage generation module 220 to output a reference voltage signal to the power supply voltage generation module 220.

In the embodiment of the present application, the power generation module 210 is further configured with a second output end, and the second output end may be connected to the main input end of the power supply voltage generation module 220, so as to output the reference voltage signal generated by the power generation module 210 to the power supply voltage generation module 220.

That is, the power generation module 210 in the embodiment of the present application may generate the first voltage signal to supply power to the power supply voltage generation module 220, and may also provide the reference voltage signal to the power supply voltage generation module 220.

As shown in fig. 4, fig. 4 is a schematic diagram of a power generation module according to an embodiment of the present application, as an implementation manner, the power generation module 210 may include a first reference source 2101 and a first power voltage generation circuit 2102, where a first output terminal of the first reference source 2101 is connected to the first power voltage generation circuit 2102 to output a reference voltage signal to the first power voltage generation circuit 2102.

The output terminal of the first power supply voltage generating circuit 2102 is connected to the power supply input terminal of the power supply voltage generating module 220, so as to output a first voltage signal to the power supply voltage generating module 220, where the first voltage signal is a signal generated by the first power supply voltage generating circuit 2102 based on the reference voltage signal.

The second output terminal of the first reference source 2101 is connected to the main input terminal of the supply voltage generating module 220 to output a reference voltage signal to the supply voltage generating module 220.

In this embodiment, the first reference voltage source 2101 generates a reference voltage signal and outputs the reference voltage signal to the first power supply voltage generating circuit 2102, so that the first power supply voltage generating circuit 2102 can generate a first voltage signal for supplying power to the power supply voltage generating module 220 based on the reference voltage signal.

Meanwhile, the first reference source 2101 may also generate a reference voltage signal to output to the supply voltage generating module 220, so that the supply voltage generating module 220 generates the supply voltage signal based on the reference voltage signal.

It is appreciated that the first reference source 2101 may be any existing reference voltage source including, but not limited to, a zener reference source, a bandgap reference source, or other reference voltage generating circuit capable of generating a reference voltage, etc.

The first supply voltage generating circuit 2102 may be any of a variety of existing linear voltage stabilizing sources, DC-DC converters, or other types of circuits that can generate a particular output voltage based on a reference voltage and provide current drive.

It should be noted that, the reference voltage signal generated by the first reference source 2101 and the reference voltage signal may be voltage signals with the same amplitude frequency or may be voltage signals with different amplitude frequencies, which may be specifically determined according to the actual application scenario, and are not limited herein. In the present embodiment, even if both the first reference source 2101 and the first power supply voltage generating circuit 2102 are powered by the first external power supply 300, the first voltage signal that powers the power supply voltage generating module 220 has a certain suppression capability of external power supply voltage fluctuation due to the characteristics of the first reference source 2101 and the first power supply voltage generating circuit 2102, and in combination with the suppression capability of external power supply voltage fluctuation of the power supply voltage generating module 220 itself, stability of the power supply voltage signal that is supplied to the module to be powered 400 can be ensured.

It should be noted that in some other application scenarios, the reference voltage signal and the reference voltage signal may be generated by different reference sources, where the power generation module 210 may include more reference sources than those shown in fig. 4, for example, the power generation module 210 may further include a second reference source in addition to the first reference source 2101, and the first reference source 2101 may be connected to the first power voltage generation circuit 2102 to output the reference voltage signal to the first power voltage generation circuit 2102, and the second reference source may be connected to the power voltage generation module 220 to output the reference voltage signal to the power voltage generation module 220. Accordingly, the composition and structure of the power generation module 210 may be determined according to the actual application scenario, and is not limited herein.

Referring to fig. 5, fig. 5 is a schematic diagram of another structure of a power supply circuit according to an embodiment of the present application, in some embodiments of the present application, the power supply circuit 200 may further include a first reference voltage generating module 230, and a first output terminal of the power supply generating module 210 may be further connected to a power supply input terminal of the first reference voltage generating module 230 to output a second voltage signal to the first reference voltage generating module 230, where the second voltage signal is used to power the first reference voltage generating module 230; the output terminal of the first reference voltage generating module 230 is connected to the main input terminal of the supply voltage generating module 220, so as to output a reference voltage signal to the supply voltage generating module 220.

In this embodiment of the present application, the power generation module 210 may generate the first voltage signal and the second voltage signal, respectively, so as to output the first voltage signal to supply power to the power supply voltage generation module 220 and output the second voltage signal to supply power to the first reference voltage generation module 230.

It is understood that the first voltage signal and the second voltage signal may be the same voltage signal or may be different voltage signals.

As an example, if the first voltage signal and the second voltage signal are both the same voltage signal, the voltage signal generated by the power generation module 210 may be output to the supply voltage generation module 220 and the first reference voltage generation module 230, respectively, to supply power to the supply voltage generation module 220 and the first reference voltage generation module 230.

As another example, if the first voltage signal and the second voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is greater than the magnitude of the second voltage signal, the power generation module 210 may output the first voltage signal to the power supply voltage generation module 220, and simultaneously, step-down the first voltage signal, so as to obtain the second voltage signal, and output the second voltage signal to the first reference voltage generation module 230.

As yet another example, if the first voltage signal and the second voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is smaller than the magnitude of the second voltage signal, the power generation module 210 may output the first voltage signal to the power supply voltage generation module 220, and at the same time, boost the first voltage signal, thereby obtaining the second voltage signal, and outputting the second voltage signal to the first reference voltage generation module 230.

It will be appreciated that, in practical applications, the magnitudes of the first voltage signal and the second voltage signal may be determined according to the operating voltages corresponding to the power supply voltage generating module 220 and the first reference voltage generating module 230, which is not limited herein.

In an embodiment of the present application, the reference voltage signal is generated by the first reference voltage generating module 230, and the first reference voltage generating module 230 may be any existing linear voltage stabilizing source, DC-DC converter or other type of circuit that can generate a specific output voltage based on the reference voltage and provide current driving.

Since the second voltage signal output by the power generation module 210 has a certain external power supply voltage fluctuation suppression capability, the second voltage signal is used to supply power to the first reference voltage generation module 230, so that the first reference voltage generation module 230 can stably operate, and compared with the case that the reference voltage signal is generated by the power generation module 210 powered by the first external power supply 300, the stable reference voltage signal can be ensured to be output to the power supply voltage generation module 220, thereby further improving the stability of the power supply voltage signal output by the power supply voltage generation module 220, ensuring that the module 400 to be powered can stably operate, and realizing the functions and performances thereof.

In practical applications, if the circuit has a severe peripheral environment, besides the external power supply voltage fluctuation, there may be space electromagnetic interference (Electro Magnetic Interference, EMI) with a certain frequency band, where the EMI may interfere with the reference voltage signal, thereby affecting the power supply voltage signal generated by the power supply voltage generating module 220, and generating a larger voltage fluctuation at the power supply voltage signal, so that the functions and performances of the module to be powered 400 are affected by the voltage fluctuation.

Referring to fig. 6, fig. 6 is a schematic diagram of another structure of a power supply circuit according to an embodiment of the present application, in some embodiments of the present application, the power supply circuit 200 may further include a filtering module 240, the filtering module 240 is configured with an input terminal for receiving a reference voltage signal, and an output terminal of the filtering module 240 is connected to a main input terminal of the power supply voltage generating module 220 to output the filtered reference voltage signal to the power supply voltage generating module 220.

In the embodiment of the present application, the filtering module 240 may perform filtering processing on the reference voltage signal input from the input end, and then output the reference voltage signal after the filtering processing to the supply voltage generating module 220.

It can be appreciated that, according to different external environments of the circuit, the interference frequency bands of EMI are different, so in the embodiment of the present application, the filtering frequency band of the filtering module 240 may be determined according to the actual application scenario.

For example, before the power supply circuit 200 of the present application is applied, an application environment of the power supply circuit 200 may be detected in advance, and an electromagnetic interference frequency band existing in the application environment is sampled, so that a cut-off frequency of the filtering module 240 is set according to the sampled electromagnetic interference frequency band, so as to filter an influence of electromagnetic interference on the reference voltage signal by the filtering module 240.

The filtering module 240 may be any existing active filter or passive filter, including but not limited to a low-pass filter, a high-pass filter, or a band-pass filter, and the type of the filtering module 240 may be determined according to the actual application scenario, which is not limited herein.

For example, if the electromagnetic interference frequency ranges from 10kHz to 50kHz, the filtering module 240 may be set to be a low-pass filter with a cutoff frequency lower than 10kHz, so as to filter electromagnetic interference signals higher than the cutoff frequency, and ensure that the reference voltage signal output to the supply voltage generating module 220 is free of electromagnetic interference.

In the embodiment of the application, the filtering module 240 solves the problem that the space electromagnetic interference affects the reference voltage signal, improves the electromagnetic interference resistance of the power supply circuit 200, and ensures the function and performance of the module to be supplied 400.

As shown in fig. 7, fig. 7 is a schematic diagram of a power supply structure of a filtering module according to an embodiment of the present application, and in some embodiments of the present application, the filtering module 240 may be powered by a first external power source 300, that is, the first external power source may output a voltage signal adapted to an operating voltage of the filtering module 240 to power the filtering module 240.

It will be appreciated that in other embodiments, the filtering module 240 may also be powered by other external power sources that are different from the first external power source 300.

As shown in fig. 8, fig. 8 is a schematic diagram of another power supply structure of the filtering module according to the embodiment of the present application, and in still other embodiments of the present application, the first output terminal of the power generation module 210 may be further connected to the power input terminal of the filtering module 240 to output a third voltage signal to the filtering module 240, where the third voltage signal may be used to power the filtering module 240.

In an embodiment of the present application, the power generation module 210 may further generate a third voltage signal to supply power to the filtering module 240.

It is understood that the third voltage signal may be a voltage signal having the same amplitude as the first voltage signal or may be a voltage signal having a different amplitude from the first voltage signal.

As an example, if the third voltage signal and the first voltage signal are both voltage signals with the same amplitude, the voltage signals generated by the power generation module 210 may be output to the filtering module 240 and the supply voltage generation module 220, respectively, to supply power to the filtering module 240 and the supply voltage generation module 220.

As another example, if the third voltage signal and the first voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is greater than the magnitude of the third voltage signal, the power generation module 210 may output the first voltage signal to the power supply voltage generation module 220, and simultaneously, step-down the first voltage signal, so as to obtain the third voltage signal, and output the third voltage signal to the filtering module 240.

As yet another example, if the third voltage signal and the first voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is smaller than the magnitude of the third voltage signal, the power generation module 210 may output the first voltage signal to the supply voltage generation module 220, and at the same time, boost the first voltage signal, so as to obtain the third voltage signal, and output the third voltage signal to the filtering module 240.

It will be appreciated that, in practical applications, the magnitudes of the first voltage signal and the third voltage signal may be determined according to the operating voltages corresponding to the power supply voltage generating module 220 and the filtering module 240, which is not limited herein.

In the embodiment of the present application, since the third voltage signal output by the power generation module 210 has a certain capability of suppressing the fluctuation of the external power supply voltage, the third voltage signal is used to supply power to the filtering module 240, so that the filtering module 240 can work stably, and compared with the case that the second external power supply 500 is used to supply power to the filtering module 240, the stability of the filtered reference voltage signal can be ensured, so that the stability of the power supply voltage signal output by the power supply voltage generation module 220 is further improved, the stable operation of the module to be powered 400 is ensured, and the functions and performances of the module to be powered are realized.

Referring to fig. 9, fig. 9 is a schematic diagram illustrating a connection structure of a filtering module according to an embodiment of the application, and in some embodiments of the application, an input terminal of the filtering module 240 may be connected to a second output terminal of the power generation module 210 to receive a reference voltage signal from the power generation module 210.

Since the power generation module 210 has a certain capability of resisting external power supply voltage interference, the reference voltage signal output to the filtering module 240 has a certain capability of resisting external power supply voltage interference, and after the reference voltage signal is filtered by the filtering module 240, the reference voltage signal input to the power supply voltage generation module 220 has the capability of resisting external power supply voltage interference as well as the capability of resisting electromagnetic interference, so that the reliability of the power supply circuit 200 is greatly improved, and the functions and performances of the module to be supplied 400 are ensured.

In connection with the above embodiment, it can be appreciated that in this embodiment, the filtering module 240 may be powered by an external power source or may be powered by the power generating module 210, which may be specifically selected according to the practical application scenario, and is not limited herein.

As shown in fig. 10, fig. 10 is a schematic diagram of another connection structure of a filtering module provided in an embodiment of the present application, in some embodiments of the present application, an output terminal of a second reference voltage generating module 250 may be connected to an input terminal of the filtering module 240 to receive a reference voltage signal from the second reference voltage generating module 250, and a first output terminal of the power generating module 210 is further connected to a power input terminal of the second reference voltage generating module 250 to output a fourth voltage signal to the second reference voltage generating module 250, where the fourth voltage signal may be used to power the second reference voltage generating module 250.

In an embodiment of the present application, the power generation module 210 may further generate a fourth voltage signal to supply the second reference voltage generation module 250 with power.

It is understood that the fourth voltage signal may be a voltage signal having the same amplitude as the first voltage signal or may be a voltage signal having a different amplitude from the first voltage signal.

As an example, if the fourth voltage signal and the first voltage signal are both voltage signals having the same magnitude, the voltage signals generated by the power generation module 210 may be output to the second reference voltage generation module 250 and the supply voltage generation module 220, respectively, to supply power to the second reference voltage generation module 250 and the supply voltage generation module 220.

As another example, if the fourth voltage signal and the first voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is greater than the magnitude of the fourth voltage signal, the power generation module 210 may output the first voltage signal to the power supply voltage generation module 220, and simultaneously, step-down the first voltage signal, so as to obtain the fourth voltage signal, and output the fourth voltage signal to the second reference voltage generation module 250.

As yet another example, if the fourth voltage signal and the first voltage signal are different voltage signals, for example, the magnitude of the first voltage signal is smaller than the magnitude of the fourth voltage signal, the power generation module 210 may output the first voltage signal to the power supply voltage generation module 220, and at the same time, boost the first voltage signal, thereby obtaining the fourth voltage signal, and outputting the fourth voltage signal to the filtering module 240.

It will be appreciated that, in practical applications, the magnitudes of the first voltage signal and the fourth voltage signal may be determined according to the respective operating voltages of the supply voltage generating module 220 and the second reference voltage generating module 250, which are not limited herein.

In an embodiment of the present application, the reference voltage signal is generated by the second reference voltage generating module 250, and the second reference voltage generating module 250 may be any existing linear voltage stabilizing source, DC-DC converter or other type of circuit that can generate a specific output voltage based on the reference voltage and provide current driving.

Because the fourth voltage signal output by the power generation module 210 has a certain external power supply voltage fluctuation suppression capability, the fourth voltage signal is used for supplying power to the second reference voltage generation module 250, so that the second reference voltage generation module 250 can work stably, compared with the case that the external power supply is used for supplying power to the second reference voltage generation module 250, the stability of the reference voltage signal generated by the second reference voltage generation module 250 can be ensured, and the filtering module 240 is combined to filter electromagnetic interference, so that the power supply voltage signal output by the power supply voltage generation module 220 has strong external power supply voltage interference resistance and strong electromagnetic interference resistance, the reliability of the power supply circuit 200 is greatly improved, and the power to be supplied module 400 can work stably, thereby realizing the functions and performances of the power supply circuit.

It can be appreciated that in this embodiment, the filtering module 240 may be powered by an external power source or may be powered by the power generating module 210, which may be specifically selected according to the practical application scenario, and is not limited herein.

Based on the structure and principle of the power supply circuit described in the foregoing embodiments, in order to further improve the stability of the power supply voltage signal, in some embodiments of the present application, the power supply voltage generating module 220 may include at least two cascaded power supply voltage generating units, where each power supply voltage generating unit is configured with a main input terminal to receive a corresponding reference voltage signal.

The power input of the first stage supply voltage generating unit of the at least two cascaded supply voltage generating units is connected to the first output of the power generating module 210.

The output end of the first-stage power supply voltage generating unit is connected with the power input end of the adjacent next-stage power supply voltage generating unit; the output end of each secondary power supply voltage generating unit in the at least two cascaded power supply voltage generating units is connected with the power supply input end of the adjacent next-stage power supply voltage generating unit.

The output of the last supply voltage generation unit of the at least two cascaded supply voltage generation units is connected to the module to be supplied 400.

Referring to fig. 11, fig. 11 is a schematic diagram of a power supply voltage generating module according to an embodiment of the present application, as an implementation manner, the power supply voltage generating module 220 includes two cascaded power supply voltage generating units, which are a first stage power supply voltage generating unit 2201 and a last stage power supply voltage generating unit 2202, respectively:

the power input end of the first-stage power supply voltage generating unit 2201 is connected to the first output end of the power supply generating module 210, the main input end of the first-stage power supply voltage generating unit 2201 is used for receiving a first-stage reference voltage signal, the output end of the first-stage power supply voltage generating unit 2201 is connected to the power input end of the final-stage power supply voltage generating unit 2202, the main input end of the final-stage power supply voltage generating unit 2202 is used for receiving a final-stage reference voltage signal, and the output end of the final-stage power supply voltage generating unit 2202 is connected to the module 400 to be powered.

In this embodiment, the first voltage signal output by the power supply generating module 210 may drive the first stage power supply voltage generating unit 2201 to operate, where the first stage power supply voltage generating unit 2201 generates a first stage voltage signal according to the first stage reference voltage signal input by the main input end, outputs the first stage voltage signal to the power input end of the last stage power supply voltage generating unit 2202, so as to supply power to the last stage power supply voltage generating unit 2202 through the first stage voltage signal, and the last stage power supply voltage generating unit 2202 generates a power supply voltage signal according to the last stage reference voltage signal input by the main input end, so as to supply power to the module 400 to be powered.

It will be appreciated that the first stage supply voltage generation unit 2201 and the last stage supply voltage generation unit 2202 may each be any of a variety of existing linear voltage stabilizing sources, direct Current-Direct Current (DC-DC) converters, or other types of circuits that can generate a particular output voltage based on a reference voltage and provide Current drive.

The power supply generating module 210, the first-stage power supply voltage generating unit 2201 and the last-stage power supply voltage generating unit 2202 all have a certain capability of suppressing fluctuation of the external power supply voltage, so that the first voltage signal output by the power supply generating module 210 has a certain capability of suppressing fluctuation of the external power supply voltage, the first-stage power supply voltage generating unit 2201 can be powered by the first voltage signal, the first-stage power supply voltage signal output by the first-stage power supply voltage generating unit 2201 is superposed with the capability of suppressing fluctuation of the external power supply voltage by the power supply generating module 210 and the first-stage power supply voltage generating unit 2201, and then the last-stage power supply voltage generating unit 2202 is powered by the first-stage voltage signal, so that the last-stage power supply voltage generating unit 2202 can be further stabilized, and the power supply voltage signal output by the last-stage power supply voltage generating unit 2202 is superposed with the capability of suppressing fluctuation of the external power supply voltage by the power supply generating module 210, the first-stage power supply voltage generating unit 2201 and the last-stage power supply voltage generating unit 2202, thereby ensuring the stability of the power supply voltage signal, so that the power supply module 400 can work more stably, and the function and performance of the power supply module can be realized.

It will be appreciated that the first stage reference voltage signal and the last stage reference voltage signal in this embodiment may be generated by the power generation module 210, or may be generated by another reference voltage generation module, which may be specifically referred to the description in the above embodiments, and will not be repeated here.

Referring to fig. 12, fig. 12 is another schematic diagram of a supply voltage generating module according to an embodiment of the present application, as another implementation manner, the supply voltage generating module 220 includes three cascaded supply voltage generating units, which are a first stage supply voltage generating unit 2201, a last stage supply voltage generating unit 2202, and a secondary supply voltage generating unit 2203, respectively:

the power input end of the first-stage power supply voltage generating unit 2201 is connected to the first output end of the power supply generating module 210, the main input end of the first-stage power supply voltage generating unit 2201 is used for receiving a first-stage reference voltage signal, the output end of the first-stage power supply voltage generating unit 2201 is connected to the power input end of the secondary power supply voltage generating unit 2203, the main input end of the secondary power supply voltage generating unit 2203 is used for receiving a secondary reference voltage signal, the output end of the secondary power supply voltage generating unit 2203 is connected to the power input end of the final-stage power supply voltage generating unit 2202, the main input end of the final-stage power supply voltage generating unit 2202 is used for receiving a final-stage reference voltage signal, and the output end of the final-stage power supply voltage generating unit 2202 is connected to the module 400 to be powered.

In this embodiment, the first voltage signal output by the power generating module 210 may drive the first stage power supply voltage generating unit 2201 to operate, the first stage power supply voltage generating unit 2201 generates a first stage voltage signal according to the first stage reference voltage signal input by the main input end and outputs the first stage voltage signal to the power input end of the last stage power supply voltage generating unit 2202, so as to supply power to the secondary power supply voltage generating unit 2203 through the first stage voltage signal, the secondary power supply voltage generating unit 2203 generates a secondary voltage signal according to the secondary reference voltage signal input by the main input end and supplies power to the last stage power supply voltage generating unit 2202, and the last stage power supply voltage generating unit 2202 generates a power supply voltage signal according to the last stage reference voltage signal input by the main input end to supply power to the module 400 to be powered.

Likewise, the primary power supply voltage generating unit 2201, the final power supply voltage generating unit 2202, and the secondary power supply voltage generating unit 2203 may be any existing linear voltage stabilizing source, direct Current-Direct Current (DC-DC) converter, or other types of circuits that can generate a specific output voltage based on a reference voltage and provide Current driving.

As can be seen from the principle described in the above embodiments, in this embodiment, the power supply voltage signal is superimposed with the capability of the power supply generating module 210, the primary power supply voltage generating unit 2201, the secondary power supply voltage generating unit 2203, and the final power supply voltage generating unit 2202 to suppress the external power supply voltage fluctuation, so that the stability of the power supply voltage signal is greatly improved, and the module to be powered 400 can operate more stably, thereby realizing the functions and performances thereof.

It should be noted that fig. 11 and fig. 12 are only an example of the power supply voltage generating module 220 of the present application, and in other application scenarios, the power supply voltage generating module 220 may further include more power supply voltage generating units. It will be appreciated that as the number of cascaded supply voltage generating units increases, the stability of the resulting supply voltage signal increases, but the circuit cost increases and the circuit area increases. Therefore, the number of the power supply voltage generating units may be determined according to the actual application scenario, and is not limited herein.

On the basis of the above embodiments, the present application also provides a chip, which may include the power supply circuit as in any of the embodiments of fig. 2 to 12. The Chip may be an integrated circuit (Integrated Circuit, IC), or microcircuit, microchip, wafer/Chip (Chip), which may be, but is not limited to, a System On Chip (SOC), system in package (System In Package, SIP) Chip.

The power supply circuit of the chip supplies power for the power supply voltage generation module through the first voltage signal output by the power supply generation module, and then the power supply voltage generation module generates the power supply voltage signal based on the reference voltage signal to supply power for the module to be powered, because the power supply generation module has certain inhibition capability to the fluctuation of the external power supply voltage, the first voltage signal output by the power supply generation module is stable, the power supply voltage generation module is supplied with power through the first voltage signal, the influence of the fluctuation of the external power supply voltage on the power supply voltage generation module can be reduced, the stability of the power supply voltage signal is improved, the power supply voltage generation module also has certain inhibition capability to the fluctuation of the external power supply voltage on the basis, the stability of the power supply voltage signal is further improved, the capability of the power supply circuit for resisting the interference of the external power supply is improved, the inhibition effect of the power supply circuit to the fluctuation of the external power supply voltage is greatly improved, the reliability of the power supply circuit is improved, and the module to be powered can work stably is ensured.

The embodiment of the application also provides electronic equipment, which can comprise an equipment main body and the chip or the power supply circuit arranged in the equipment main body. The electronic device may be, but is not limited to, a body weight scale, a body fat scale, a nutritional scale, an infrared electronic thermometer, a pulse oximeter, a body composition analyzer, a mobile power supply, a wireless charger, a fast charger, a vehicle-mounted charger, an adapter, a display, a universal serial bus (Universal Serial Bus, USB) docking station, a stylus, a true wireless smart (True Wireless Stereo, TWS) headset, an automobile center control unit, an automobile, an intelligent wearable device, a mobile terminal, an intelligent home device.

Wherein, intelligent wearing equipment includes but is not limited to intelligent wrist-watch, intelligent bracelet, cervical vertebra massage appearance. Mobile terminals include, but are not limited to, smartphones, notebook computers, tablet computers, point-of-sale terminals (point of sales terminal, POS). The intelligent household equipment comprises, but is not limited to, an intelligent socket, an intelligent electric cooker, an intelligent sweeper and an intelligent lamp.

The power supply circuit of the chip in the electronic equipment supplies power for the power supply voltage generation module through the first voltage signal output by the power supply generation module, the power supply voltage generation module generates the power supply voltage signal based on the reference voltage signal to supply power for the module to be powered, and the power supply generation module has a certain inhibition capability to the fluctuation of the external power supply voltage.

Although the present application has been described in terms of the preferred embodiments, it should be understood that the present application is not limited to the specific embodiments, but is capable of numerous modifications and equivalents, and alternative embodiments and modifications of the embodiments described above, without departing from the spirit and scope of the present application.

Claims (11)

1. A power supply circuit, characterized by comprising a power supply voltage generation module and a power supply generation module powered by a first external power supply;

the first output end of the power supply generating module is connected with the power supply input end of the power supply voltage generating module so as to output a first voltage signal to the power supply voltage generating module, and the first voltage signal is used for supplying power to the power supply voltage generating module;

the power supply voltage generation module is configured with a main input end for receiving a reference voltage signal, the output end of the power supply voltage generation module is connected with the power supply module to output a power supply voltage signal to the power supply module, the power supply voltage signal is a signal generated by the power supply voltage generation module based on the reference voltage signal, and the power supply voltage signal is used for supplying power to the power supply module.

2. The power supply circuit of claim 1, wherein the second output terminal of the power supply generation module is connected to the main input terminal of the power supply voltage generation module to output the reference voltage signal to the power supply voltage generation module.

3. The power supply circuit of claim 2, wherein the power supply generation module comprises a first reference source and a first power supply voltage generation circuit, a first output of the first reference source being connected to the first power supply voltage generation circuit to output a reference voltage signal to the first power supply voltage generation circuit;

the output end of the first power supply voltage generation circuit is connected with the power supply input end of the power supply voltage generation module so as to output the first voltage signal to the power supply voltage generation module, wherein the first voltage signal is a signal generated by the first power supply voltage generation circuit based on the reference voltage signal;

the second output end of the first reference standard source is connected with the main input end of the power supply voltage generation module so as to output the reference voltage signal to the power supply voltage generation module.

4. The power supply circuit of claim 1, further comprising a first reference voltage generation module, the first output of the power generation module further coupled to the power input of the first reference voltage generation module to output a second voltage signal to the first reference voltage generation module, the second voltage signal configured to power the first reference voltage generation module;

The output end of the first reference voltage generation module is connected with the main input end of the power supply voltage generation module so as to output the reference voltage signal to the power supply voltage generation module.

5. The power supply circuit of claim 1, further comprising a filter module configured with an input for receiving the reference voltage signal, an output of the filter module being coupled to a main input of the supply voltage generation module for outputting the filtered reference voltage signal to the supply voltage generation module.

6. The power supply circuit of claim 5, wherein the filter module is powered by the first external power source, or,

the first output end of the power generation module is connected with the power input end of the filtering module so as to output a third voltage signal to the filtering module, and the third voltage signal is used for supplying power to the filtering module.

7. The power supply circuit of claim 6, wherein an input of the filter module is coupled to a second output of the power generation module to receive the reference voltage signal from the power generation module.

8. The power supply circuit of claim 6, wherein an input of the filter module is connected to an output of a second reference voltage generation module to receive the reference voltage signal from the second reference voltage generation module;

the first output end of the power supply generating module is also connected with the power supply input end of the second reference voltage generating module so as to output a fourth voltage signal to the second reference voltage generating module, wherein the fourth voltage signal is used for supplying power to the second reference voltage generating module.

9. The power supply circuit of claim 1, wherein the supply voltage generation module comprises at least two cascaded supply voltage generation units, each configured with a main input to receive a corresponding reference voltage signal;

the power supply input end of a first-stage power supply voltage generation unit in the at least two cascaded power supply voltage generation units is connected with the first output end of the power supply generation module;

the output end of the first-stage power supply voltage generation unit is connected with the power input end of the adjacent next-stage power supply voltage generation unit;

the output end of each secondary power supply voltage generating unit in the at least two cascaded power supply voltage generating units is connected with the power supply input end of the adjacent next-stage power supply voltage generating unit;

The output end of the final supply voltage generating unit in the at least two cascaded supply voltage generating units is connected with the module to be supplied with power.

10. A chip comprising the power supply circuit of any one of claims 1-9.

11. An electronic device comprising a device body and the chip of claim 10 or the power supply circuit of any one of claims 1-9 provided to the device body.