CN109361831A - The automatically controlled equalizing circuit of high-precision multiband - Google Patents
The automatically controlled equalizing circuit of high-precision multiband Download PDFInfo
- Publication number
- CN109361831A CN109361831A CN201811283927.5A CN201811283927A CN109361831A CN 109361831 A CN109361831 A CN 109361831A CN 201811283927 A CN201811283927 A CN 201811283927A CN 109361831 A CN109361831 A CN 109361831A
- Authority
- CN
- China
- Prior art keywords
- module
- frequency band
- switching module
- frequency
- automatically controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Abstract
The present invention relates to cable TV network product technical fields, more particularly to a kind of automatically controlled equalizing circuit of high-precision multiband, it includes single-chip microcontroller and balance module, the balance module and monolithic mechatronics, it further includes frequency band switching module, the frequency band switching module is electrically connected with single-chip microcontroller and balance module respectively, in which: balance module has the function of changing waveform slope；Frequency band switching module has the function of changing different frequency bands；Single-chip microcontroller has the function of controlling balance module and frequency band switching module.This equalizing circuit is able to achieve frequency band switching and maintenance cost is lower.
Description
Technical field
The present invention relates to the automatically controlled balanced electricity of cable TV network product technical field more particularly to a kind of high-precision multiband
Road.
Background technique
CATV signal will cause loss in the transmission of cable/optical fiber in cable TV network.Wherein cable/optical fiber
Attenuation characteristic increases with the raising of frequency, and on the other hand, the decaying of signal increases with the increase of cable/fiber distance.Cause
This transmission cable/optical fiber to different distance, transmission signal can generate different decaying and slope, and depreciation needs to use Different Slope
The loss of the equalizing signal of value, balancing band inner curve enable signals to stablize, good, remote transmission.On-line Product liter
Upstream band can be changed accordingly with demand when grade, and the frequency band of equalizing circuit is also required to be changed accordingly.
Carry out thermal compensation signal amplitude using equalizing circuit in upstream amplifier and node.The equilibrium electricity being commonly used
Road is automatically controlled equalizing circuit, can carry out the change of slope, to signal by remotely-or locally controlling to reach compensation
Purpose.But the equalizing circuit of the prior art cannot achieve the variation of multiband when On-line Product frequency band upgrades, as Fig. 1 with
Shown in Fig. 2, it can only be realized by replacement frequency-selecting module.And plug-in module volume is larger and brings heat dissipation, plug mistake therewith
The problems such as effect, wasting manpower and material resources, the working service in product later period is seriously affected, maintenance cost is increased.
Summary of the invention
The technical problems to be solved by the present invention are: providing, one kind being able to achieve frequency band switching and maintenance cost is lower high-precision
Spend the automatically controlled equalizing circuit of multiband.
The technical scheme adopted by the invention is that: a kind of automatically controlled equalizing circuit of high-precision multiband, it include single-chip microcontroller with
And balance module, the balance module and monolithic mechatronics, it is characterised in that: it further includes frequency band switching module, the frequency
Band switching module is electrically connected with single-chip microcontroller and balance module respectively, in which: balance module has the function for changing waveform slope
Energy；Frequency band switching module has the function of changing different frequency bands；There is single-chip microcontroller control balance module and frequency band to switch mould
The function of block.
Using the above structure compared with prior art, the invention has the following advantages that frequency can be controlled by single-chip microcontroller
Band switching module, and then realize the switching of frequency band, and do not need plug frequency-selecting module, maintenance cost is lower.
Preferably, the frequency band switching module includes multiple frequency-selecting modules and for switching cutting for multiple frequency-selecting modules
Change the mold block, and the switching module is electrically connected with single-chip microcontroller and balance module respectively, and the multiple frequency-selecting module with cut
Change the mold block electrical connection.Switched between multiple frequency-selecting modules by switching module, control in this way is got up more convenient.
Preferably, the switching module includes single pole multiple throw chip.Switched using single pole multiple throw chip
Frequency-selecting module switches in this way and comes more convenient, and cost is relatively low.
The frequency-selecting module includes LC series circuit, and LC series circuit both ends have also been arranged in series blocking electricity respectively
Hold.Because be provided with switching module and multiple frequency-selecting modules, interference is more, and be provided with capacitance can play compared with
Good anti-jamming effectiveness.
Preferably, the frequency-selecting module includes LC oscillating circuit, and the LC oscillating circuit is also gone here and there far from ground connection one end
Connection is provided with capacitance.Because being provided with switching module and multiple frequency-selecting modules, interference is more, and is provided with blocking
Capacitor can play preferable anti-jamming effectiveness.
Detailed description of the invention
Fig. 1 is the module frame chart of prior art equalizing circuit.
Fig. 2 is the circuit diagram of prior art equilibrium electric power.
Fig. 3 is the module frame chart of the automatically controlled equalizing circuit of high-precision multiband of the present invention.
Fig. 4 is the circuit diagram of the automatically controlled equalizing circuit of high-precision multiband of the present invention.
Fig. 5 is the enlarged drawing of upper portion in Fig. 4.
Fig. 6 is the enlarged drawing of lower portion in Fig. 4.
Specific embodiment
The present invention is described further below in conjunction with attached drawing and specific embodiment, but the present invention be not limited only to it is following
Specific embodiment.
As shown in Figure 1 be the equalizing circuit of the prior art, i.e. its only one frequency-selecting module, as L51, C59 in Fig. 2 this
A pair of of LC series circuit and C56, L62 this pair of LC oscillating circuit, this frequency-selecting module determine the frequency of automatically controlled equalizing circuit
The characteristics such as rate cut-point and flatness.
The application specific embodiment as shown in figure 3, a kind of automatically controlled equalizing circuit of high-precision multiband, it include single-chip microcontroller,
Balance module and frequency band switching module, the balance module and monolithic mechatronics, the frequency band switching module respectively with list
Piece machine and balance module electrical connection, in which:
Balance module has the function of changing waveform slope, as shown in Figure 2 and Figure 4, identical as the balance module of the prior art.
Frequency band switching module has the function of changing different frequency bands, mainly including multiple frequency-selecting modules and for switching
The switching module of multiple frequency-selecting modules, and the switching module is electrically connected with single-chip microcontroller and balance module respectively, and described more
A frequency-selecting module is electrically connected with switching module.Wherein switching module selects single pole multiple throw chip, in this specific embodiment
Middle selection hilted broadsword four-throw switch chip, as shown in Figure 4.Then as shown in figure 5, between the input and output of balance module chip
Two hilted broadsword four-throw switch chips are set, and are provided with four road LC series circuits between two hilted broadsword four-throw switch chips, and
And every road LC series circuit both ends are provided with capacitance, such single-chip microcontroller can be by controlling the two four throw switches of hilted broadsword
Chip selects different LC series circuits.As shown in fig. 6, being set before ground connection between equalizing circuit chip and coupling circuit
It is equipped with a hilted broadsword four-throw switch chip, and this hilted broadsword four-throw switch chip is grounded by four LC oscillating circuits, and
One capacitance of series connection, such single-chip microcontroller can pass through before each LC oscillating circuit is connect with hilted broadsword four-throw switch chip
This hilted broadsword four-throw switch chip is controlled to select different LC oscillating circuits.I.e. single-chip microcontroller can control three hilted broadsword four-throws and open
Chip is closed to select different LC series circuits and different LC oscillating circuits, realizes frequency-selecting function.
Single-chip microcontroller has the function of controlling balance module and frequency band switching module.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of skill in the art that it still can be right
Technical solution documented by previous embodiment is modified, or is replaced on an equal basis to part of technical characteristic；And these
It modifies or replaces, the essence of corresponding technical solution is not made to be detached from the spirit and model of technical solution of various embodiments of the present invention
It encloses.
Claims (5)
1. a kind of automatically controlled equalizing circuit of high-precision multiband, it includes single-chip microcontroller and balance module, the balance module and list
Piece mechatronics, it is characterised in that: it further includes frequency band switching module, the frequency band switching module respectively with single-chip microcontroller and
The module that weighs electrical connection, in which:
Balance module has the function of changing waveform slope；
Frequency band switching module has the function of changing different frequency bands；
Single-chip microcontroller has the function of controlling balance module and frequency band switching module.
2. the automatically controlled equalizing circuit of high-precision multiband according to claim 1, it is characterised in that: the frequency band switching module
Switching module including multiple frequency-selecting modules and for switching multiple frequency-selecting modules, and the switching module respectively with single-chip microcontroller
And balance module electrical connection, and the multiple frequency-selecting module is electrically connected with switching module.
3. the automatically controlled equalizing circuit of high-precision multiband according to claim 2, it is characterised in that: the switching module includes
Single pole multiple throw chip.
4. the automatically controlled equalizing circuit of high-precision multiband according to claim 2, it is characterised in that: the frequency-selecting module includes
LC series circuit, and LC series circuit both ends have also been arranged in series capacitance respectively.
5. the automatically controlled equalizing circuit of high-precision multiband according to claim 2, it is characterised in that: the frequency-selecting module includes
LC oscillating circuit, and the LC oscillating circuit has also been arranged in series capacitance far from ground connection one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283927.5A CN109361831A (en) | 2018-10-31 | 2018-10-31 | The automatically controlled equalizing circuit of high-precision multiband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283927.5A CN109361831A (en) | 2018-10-31 | 2018-10-31 | The automatically controlled equalizing circuit of high-precision multiband |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109361831A true CN109361831A (en) | 2019-02-19 |
Family
ID=65347472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811283927.5A Pending CN109361831A (en) | 2018-10-31 | 2018-10-31 | The automatically controlled equalizing circuit of high-precision multiband |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109361831A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101253585A (en) * | 2005-08-29 | 2008-08-27 | Lm爱立信电话有限公司 | Variable integrated inductor |
| CN101505169A (en) * | 2009-02-23 | 2009-08-12 | 中国科学院微电子研究所 | Frequency synthesizer and frequency synthesis method thereof |
| CN102204100A (en) * | 2008-11-05 | 2011-09-28 | 日立金属株式会社 | High-frequency circuit, high-frequency part, and multiband communication device |
| CN102882539A (en) * | 2011-07-14 | 2013-01-16 | 苹果公司 | Wireless circuitry for simultaneously receiving radio-frequency transmissions in different frequency bands |
| CN104541405A (en) * | 2012-08-09 | 2015-04-22 | 高通股份有限公司 | Front end parallel resonant switch |
| WO2017005863A1 (en) * | 2015-07-09 | 2017-01-12 | Constructions Electroniques + Telecommunications | High power density inverter (i) |
| US20170063412A1 (en) * | 2015-08-28 | 2017-03-02 | Skyworks Solutions, Inc. | Tunable notch filter and contour tuning circuit |
| CN108200368A (en) * | 2017-12-07 | 2018-06-22 | 宁波环球广电科技有限公司 | The high-precision adjustable electronic control equalizing circuit of cable TV network |
-
2018
- 2018-10-31 CN CN201811283927.5A patent/CN109361831A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101253585A (en) * | 2005-08-29 | 2008-08-27 | Lm爱立信电话有限公司 | Variable integrated inductor |
| CN102204100A (en) * | 2008-11-05 | 2011-09-28 | 日立金属株式会社 | High-frequency circuit, high-frequency part, and multiband communication device |
| CN101505169A (en) * | 2009-02-23 | 2009-08-12 | 中国科学院微电子研究所 | Frequency synthesizer and frequency synthesis method thereof |
| CN102882539A (en) * | 2011-07-14 | 2013-01-16 | 苹果公司 | Wireless circuitry for simultaneously receiving radio-frequency transmissions in different frequency bands |
| CN104541405A (en) * | 2012-08-09 | 2015-04-22 | 高通股份有限公司 | Front end parallel resonant switch |
| WO2017005863A1 (en) * | 2015-07-09 | 2017-01-12 | Constructions Electroniques + Telecommunications | High power density inverter (i) |
| US20170063412A1 (en) * | 2015-08-28 | 2017-03-02 | Skyworks Solutions, Inc. | Tunable notch filter and contour tuning circuit |
| CN108200368A (en) * | 2017-12-07 | 2018-06-22 | 宁波环球广电科技有限公司 | The high-precision adjustable electronic control equalizing circuit of cable TV network |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190219 |
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| RJ01 | Rejection of invention patent application after publication |