CN201878097U - Power amplification grid voltage temperature compensation circuit and radiofrequency power amplifier - Google Patents
Power amplification grid voltage temperature compensation circuit and radiofrequency power amplifier Download PDFInfo
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- CN201878097U CN201878097U CN2010206126674U CN201020612667U CN201878097U CN 201878097 U CN201878097 U CN 201878097U CN 2010206126674 U CN2010206126674 U CN 2010206126674U CN 201020612667 U CN201020612667 U CN 201020612667U CN 201878097 U CN201878097 U CN 201878097U
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Abstract
The utility model is applicable to the field of circuits, and provides a power amplification grid voltage temperature compensation circuit and a radiofrequency power amplifier. The power amplification grid voltage temperature compensation circuit comprises a compensation unit and a resistance regulating unit connected with the compensation unit, wherein a resistance regulator in the resistance regulating unit is a digital potentiometer. The digital potentiometer is used for regulating resistors, the function of changing temperature compensation coefficient is realized by an analog circuit, and advantages of an existing analog temperature compensation circuit and a digital compensation circuit are integrated while shortcomings of the two circuits are avoided. Particularly, when applied on a condition of multi-channel power amplification, the power amplification grid voltage temperature compensation circuit has positive effects on reducing production cost and development time, increasing stability and the like.
Description
Technical field
The utility model belongs to circuit field, relates in particular to a kind of power amplifier grid voltage temperature-compensation circuit and radio-frequency power amplifier.
Background technology
It is very big that the linearity of LDMOS (metal-oxide semiconductor (MOS) of horizontal proliferation) linear power amplifier is influenced by the quiescent point of power tube.Have positive temperature characterisitic near the working point, promptly under certain grid voltage, when working temperature raise, its quiescent current raise, and when working temperature reduced, its quiescent current reduced.And the variation of quiescent current can influence the indexs such as gain, efficient and linearity of system, wherein again with the linear effect maximum.So in real work, the quiescent current of stablizing power tube is very necessary.
Fig. 1 is under LDMOS the manages constant drain electrode quiescent current, the graph of a relation of grid voltage and temperature, and abscissa is represented temperature among Fig. 1, ordinate is represented grid voltage, as shown in Figure 1, make quiescent current constant, need compensate grid voltage.At present the temperature-compensation circuit that uses of industry has two kinds of analog circuit and digital circuits.
Wherein, the analog temperature compensation circuit as shown in Figure 2, come regulating circuit by the resistance of adjusting simulation potentiometer VR1, the grid voltage that makes the bucking voltage VG of this design circuit output satisfy power tube changes, and is operated in needs under the stable quiescent current to satisfy power amplifier.The advantage of this circuit is that the adjustment temperature compensation coefficient is very simple, does not need to do a large amount of high low temperature tests and fetches data.Shortcoming is that cost increases, and the analog circuit consistency is bad, might change under high low temperature or vibration condition, causes the index mis-behave if the multichannel power amplifier just needs a plurality of adjustable resistances.
And digital circuit adopts the single-chip microcomputer look-up table, by experiment, obtains grid voltage optimum value under several groups of total temperature scopes, writes single-chip microcomputer after being averaged.The advantage of this method is stable performance, and shortcoming is that every money power amplifier all needs at least 5 above model machines of extraction to do high low-temperature test, averages then, seems very loaded down with trivial details, has increased the development time.
The utility model content
The purpose of this utility model is to provide a kind of power amplifier grid voltage temperature-compensation circuit, is intended to solve in the existing grid voltage technique for temperature compensation stability and simplification can not be taken into account simultaneously, the problem of cost increase when being applied to the multichannel power amplifier.
The utility model is achieved in that a kind of power amplifier grid voltage temperature-compensation circuit, comprises compensating unit and the resistance regulon that is connected with described compensating unit, and the resistance adjuster of described resistance regulon is a digital regulation resistance.
Further, described resistance regulon also comprises resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9 and resistance R 10;
First end of described resistance R 4 is connected with described compensating unit, and second end is connected with second end of described resistance R 7;
The first end ground connection of described resistance R 5, second end is connected with first end of described resistance R 6;
Second end of described resistance R 6 is connected with first end of described resistance R 7;
First end of described resistance R 8 is connected with second end of described resistance R 9, and second end is connected with the pin RW of described digital regulation resistance;
First end of described resistance R 9 is connected with first end of described resistance R 4;
First end of described resistance R 10 is connected with the VG output, and second end is connected with first end of described resistance R 8;
The pin RL of described digital regulation resistance is connected with first end of described resistance R 6, and pin RH is connected with second end of described resistance R 6.
Further, described compensating unit comprises triode D, resistance R 1, resistance R 2, resistance R 3;
The emitter grounding of described triode D, collector electrode is connected with described resistance regulon;
First end of described resistance R 1 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 2 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 3 is connected with the base stage of described triode, and second end is connected with the collector electrode of described triode.
Another purpose of the present utility model provides a kind of radio-frequency power amplifier that comprises power amplifier grid voltage temperature-compensation circuit, described power amplifier grid voltage temperature-compensation circuit comprises compensating unit and the resistance regulon that is connected with described compensating unit, and the resistance adjuster of described resistance regulon is a digital regulation resistance.
Further, described resistance regulon also comprises resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9 and resistance R 10;
First end of described resistance R 4 is connected with described compensating unit, and second end is connected with second end of described resistance R 7;
The first end ground connection of described resistance R 5, second end is connected with first end of described resistance R 6;
Second end of described resistance R 6 is connected with first end of described resistance R 7;
First end of described resistance R 8 is connected with second end of described resistance R 9, and second end is connected with the pin RW of described digital regulation resistance;
First end of described resistance R 9 is connected with first end of described resistance R 4;
First end of described resistance R 10 is connected with the VG output, and second end is connected with first end of described resistance R 8;
The pin RL of described digital regulation resistance is connected with first end of described resistance R 6, and pin RH is connected with second end of described resistance R 6.
Further, described compensating unit comprises triode D, resistance R 1, resistance R 2, resistance R 3;
The emitter grounding of described triode D, collector electrode is connected with described resistance regulon;
First end of described resistance R 1 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 2 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 3 is connected with the base stage of described triode, and second end is connected with the collector electrode of described triode.
The utility model utilizes digital regulation resistance that resistance is mediated, and the function that changes the temperature compensation coefficient still realizes with analog circuit, combine the advantage of existing simulation temperature compensation circuit and digital compensation circuit, and the shortcoming of having avoided these two kinds of circuit, especially under the situation that is applied to the multichannel power amplifier, good effect is all arranged at aspects such as reducing production costs, reduce development time and enhanced stability.
Description of drawings
Fig. 1 is that LDMOS manages under the constant drain electrode quiescent current graph of a relation of grid voltage and temperature;
Fig. 2 is the circuit structure diagram of existing analog temperature compensation circuit;
Fig. 3 is the structure chart of the digital regulation resistance that provides of the utility model embodiment;
Fig. 4 is the circuit structure diagram of the power amplifier grid voltage temperature-compensation circuit that provides of the utility model embodiment;
Fig. 5 is the circuit structure diagram of the artificial circuit that provides of the utility model embodiment;
Fig. 6 is the simulation result figure of the artificial circuit that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment utilizes digital regulation resistance that resistance is mediated, and the function that changes the temperature compensation coefficient still realizes with analog circuit, combine the advantage of existing simulation temperature compensation circuit and digital compensation circuit, and avoided the shortcoming of circuit separately, especially under the situation that is applied to the multichannel power amplifier, good effect is all arranged at aspects such as reducing production costs, reduce development time and enhanced stability.
The utility model is achieved in that a kind of power amplifier grid voltage temperature-compensation circuit, comprises compensating unit and the resistance regulon that is connected with described compensating unit, and the resistance adjuster of described resistance regulon is a digital regulation resistance.
Embodiment one:
Fig. 3 shows the structure of the digital regulation resistance that the utility model embodiment provides, and only shows the part relevant with the utility model embodiment for convenience of explanation.
Digital regulation resistance can be selected different ways such as 2 tunnel, 4 tunnel and 8 tunnel according to demand, implements the digital regulation resistance that provides as the utility model, and this digital regulation resistance is an example with the digital regulation resistance that can connect 4 road power amplifiers.Wherein, it can control the grid voltage of each power amplifier by the address of 12C, and RH is high-end, and RL is a low side, and RW is a sliding end.Every road power amplifier all has slip register and the non volatile register of oneself.When digital regulation resistance powers on, 4 all slip registers will be set to 80H (128 decimal system), RW roughly will be positioned at the mid point of RL and RH.When the resistance of digital regulation resistance inside satisfy the bucking voltage output of circuit just, when the temperature compensation circuit can well be operated in claimed condition, digital regulation resistance is read the value that is stored in 4 nonvolatile memories, deposit corresponding slip register in, thereby realize the regulatory function of potentiometer.The embodiment that the utility model provides can model be that the single-chip microcomputer of X95840 is realized as example.
In the utility model because the working point of LDMOS power tube is relatively more responsive to grid voltage, so its bias voltage must be through regulator block (selecting 4.6V here) voltage stabilizing in the power amplifier veneer, through after the voltage stabilizing, the resistance of coming regulating circuit by the slip register of regulating digital regulation resistance, make the quiescent point of power amplifier meet the requirements of numerical value, read internal non-volatile memory then, deposit corresponding slip register in.Like this, digital regulation resistance has replaced the function of simulation potentiometer fully, by changing the slip register, can obtain in the working range temperature compensation coefficient arbitrarily.
The utility model embodiment regulates the resistance of circuit by digital positioners, under the situation that connects the multichannel power amplifier, by each road exclusive slip register and non volatile register, the stability of power amplifier grid voltage temperature-compensation circuit is strengthened, and reduce its manufacturing cost.
Embodiment two:
Fig. 4 shows the circuit structure of the power amplifier grid voltage temperature-compensation circuit that the utility model provides, and only shows the part relevant with the utility model embodiment for convenience of explanation.
This circuit comprises resistance regulon 21 and compensating unit 11.
Wherein, regulon 21 comprises resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10 and digital regulation resistance.
First end of resistance R 4 is connected with compensating unit, and second end is connected with second end of resistance R 7.
The first end ground connection of resistance R 5, second end is connected with first end of resistance R 6.
Second end of resistance R 6 is connected with first end of resistance R 7.
First end of resistance R 8 is connected with second end of resistance R 9, and second end is connected with the pin RW of digital regulation resistance.
First end of resistance R 9 is connected with first end of resistance R 4.
First end of resistance R 10 is connected with bucking voltage VG output, and second end is connected with first end of resistance R 8.
The pin RL of digital regulation resistance is connected with first end of resistance R 6, and pin RH is connected with second end of resistance R 6.
Compensating unit 11 comprises triode D, resistance R 1, resistance R 2, resistance R 3.
The emitter grounding of triode D, collector electrode is connected with the resistance regulon.
First end of resistance R 1 is connected with the base stage of triode, and second end is connected with the emitter-base bandgap grading of triode.
First end of resistance R 2 is connected with the base stage of triode, and second end is connected with the emitter-base bandgap grading of triode.
First end of resistance R 3 is connected with the base stage of triode, and second end is connected with the collector electrode of triode.
As the example of the utility model embodiment, triode D can be the triode realization of MMBT3904 with model.
In real work, change by regulating the slip register of digital regulation resistance, make the quiescent point of power amplifier meet the requirements of numerical value, read the value of internal non-volatile memory then, deposit corresponding slip register in, make the resistance of digital regulation resistance inside satisfy the bucking voltage output of circuit just, and compensating circuit 11 utilize the Vbe multiple circuit of its triode to realize temperature-compensating, thereby reach power amplifier is worked under stable quiescent current.
Example as the utility model embodiment, getting R1 is 2K ohm, and R2 is that 2K ohm, R3 are that 680ohm, R4 are that 1K ohm, R5 are that 200ohm, R6 are that 1K ohm, R7 are that 10ohm, R8 are that 100ohm, R9 are that 200ohm, R10 are that 750ohm, R103 are 10K ohm.Bigoted voltage is 4.6 volts.The circuit structure diagram of the artificial circuit that Fig. 5 provides for the utility model embodiment, be used for determining the relation of output grid voltage and temperature, the simulation result figure of the artificial circuit that Fig. 6 provides for the utility model embodiment, abscissa representation temperature among Fig. 6, ordinate is represented grid voltage, figure is as can be seen as a result by this, the voltage output of the temperature compensation circuit in this utility model is along with the rising of temperature, on a declining curve, with LDMOS pipe among Fig. 1 under constant drain electrode quiescent current, the variation tendency of grid voltage and temperature relation is consistent, and promptly the temperature compensation circuit of this utility model can be to keeping the effect that the stable grid voltage of quiescent current reaches compensation.The variation that can make static working current by this compensation technique in 0～50 ℃ of scope less than 10%.
The utility model embodiment utilizes digital regulation resistance that resistance is mediated, and the function that changes the temperature compensation coefficient still realizes with analog circuit, combine the advantage of existing simulation temperature compensation circuit and digital compensation circuit, and the shortcoming of having avoided these two kinds of circuit, especially under the situation of multichannel power amplifier, good effect is all arranged at aspects such as reducing production costs, reduce development time and enhanced stability.
Embodiment three:
The power amplifier grid voltage temperature-compensation circuit that provides among the utility model embodiment can be widely used in fields such as radio-frequency power amplifier.
The utility model embodiment utilizes digital regulation resistance that resistance is mediated, and the function that changes the temperature compensation coefficient still realizes with analog circuit, combine the advantage of existing simulation temperature compensation circuit and digital compensation circuit, and avoided the shortcoming of circuit separately, especially under the situation that is applied to the multichannel power amplifier, good effect is all arranged at aspects such as reducing production costs, reduce development time and enhanced stability.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. a power amplifier grid voltage temperature-compensation circuit comprises compensating unit and the resistance regulon that is connected with described compensating unit, it is characterized in that the resistance adjuster of described resistance regulon is a digital regulation resistance.
2. power amplifier grid voltage temperature-compensation circuit as claimed in claim 1 is characterized in that described resistance regulon also comprises resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9 and resistance R 10;
First end of described resistance R 4 is connected with described compensating unit, and second end is connected with second end of described resistance R 7;
The first end ground connection of described resistance R 5, second end is connected with first end of described resistance R 6;
Second end of described resistance R 6 is connected with first end of described resistance R 7;
First end of described resistance R 8 is connected with second end of described resistance R 9, and second end is connected with the pin RW of described digital regulation resistance;
First end of described resistance R 9 is connected with first end of described resistance R 4;
First end of described resistance R 10 is connected with bucking voltage VG output, and second end is connected with first end of described resistance R 8;
The pin RL of described digital regulation resistance is connected with first end of described resistance R 6, and pin RH is connected with second end of described resistance R 6.
3. power amplifier grid voltage temperature-compensation circuit as claimed in claim 1 is characterized in that described compensating unit comprises triode D, resistance R 1, resistance R 2, resistance R 3;
The emitter grounding of described triode D, collector electrode is connected with described resistance regulon;
First end of described resistance R 1 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 2 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 3 is connected with the base stage of described triode, and second end is connected with the collector electrode of described triode.
4. radio-frequency power amplifier that comprises power amplifier grid voltage temperature-compensation circuit, described power amplifier grid voltage temperature-compensation circuit comprises compensating unit and the resistance regulon that is connected with described compensating unit, it is characterized in that the resistance adjuster of described resistance regulon is a digital regulation resistance.
5. radio-frequency power amplifier as claimed in claim 4 is characterized in that, described resistance regulon also comprises resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9 and resistance R 10;
First end of described resistance R 4 is connected with described compensating unit, and second end is connected with second end of described resistance R 7;
The first end ground connection of described resistance R 5, second end is connected with first end of described resistance R 6;
Second end of described resistance R 6 is connected with first end of described resistance R 7;
First end of described resistance R 8 is connected with second end of described resistance R 9, and second end is connected with the pin RW of described digital regulation resistance;
First end of described resistance R 9 is connected with first end of described resistance R 4;
First end of described resistance R 10 is connected with bucking voltage VG output, and second end is connected with first end of described resistance R 8;
The pin RL of described digital regulation resistance is connected with first end of described resistance R 6, and pin RH is connected with second end of described resistance R 6.
6. radio-frequency power amplifier as claimed in claim 4 is characterized in that, described compensating unit comprises triode D, resistance R 1, resistance R 2, resistance R 3;
The emitter grounding of described triode D, collector electrode is connected with described resistance regulon;
First end of described resistance R 1 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 2 is connected with the base stage of described triode, and second end is connected with the emitter-base bandgap grading of described triode;
First end of described resistance R 3 is connected with the base stage of described triode, and second end is connected with the collector electrode of described triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206126674U CN201878097U (en) | 2010-11-17 | 2010-11-17 | Power amplification grid voltage temperature compensation circuit and radiofrequency power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206126674U CN201878097U (en) | 2010-11-17 | 2010-11-17 | Power amplification grid voltage temperature compensation circuit and radiofrequency power amplifier |
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| Publication Number | Publication Date |
|---|---|
| CN201878097U true CN201878097U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206126674U Expired - Lifetime CN201878097U (en) | 2010-11-17 | 2010-11-17 | Power amplification grid voltage temperature compensation circuit and radiofrequency power amplifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177749A (en) * | 2013-02-01 | 2013-06-26 | 上海宏力半导体制造有限公司 | Read voltage generation circuit |
| CN103684278A (en) * | 2013-09-11 | 2014-03-26 | 许文 | Biasing circuit of power amplifier |
| CN107483022A (en) * | 2017-08-15 | 2017-12-15 | 湖南时变通讯科技有限公司 | A kind of temperature-compensation circuit |
-
2010
- 2010-11-17 CN CN2010206126674U patent/CN201878097U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177749A (en) * | 2013-02-01 | 2013-06-26 | 上海宏力半导体制造有限公司 | Read voltage generation circuit |
| CN103177749B (en) * | 2013-02-01 | 2017-02-08 | 上海华虹宏力半导体制造有限公司 | Read voltage generation circuit |
| CN103684278A (en) * | 2013-09-11 | 2014-03-26 | 许文 | Biasing circuit of power amplifier |
| CN107483022A (en) * | 2017-08-15 | 2017-12-15 | 湖南时变通讯科技有限公司 | A kind of temperature-compensation circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: 518000 5th floor, building 1, Guoren science and Technology Park, the intersection of Jinxiu middle road and Cuijing Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Guoren Technology Co., Ltd Address before: 518000 building of three people's road, middle science and technology, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: CHINA GRENTECH CORPORATION Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |