CN103312285A - Self-adaptive voltage gain control circuit for power line carrier driver - Google Patents
Self-adaptive voltage gain control circuit for power line carrier driver Download PDFInfo
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- CN103312285A CN103312285A CN2013101936743A CN201310193674A CN103312285A CN 103312285 A CN103312285 A CN 103312285A CN 2013101936743 A CN2013101936743 A CN 2013101936743A CN 201310193674 A CN201310193674 A CN 201310193674A CN 103312285 A CN103312285 A CN 103312285A
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- line carrier
- control circuit
- power line
- power supply
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Abstract
The invention discloses a self-adaptive voltage grain control circuit for a power line carrier driver. The self-adaptive voltage gain control circuit comprises a power supply, wherein the power supply is outputted to a power supply voltage detection module; the power supply voltage detection module is used for converting a signal into a digital signal or an analog signal and outputting the digital signal or the analog signal to a variable gain amplifier; the variable gain amplifier is used for receiving an input signal and outputting the signal to a filter; and the filter is used for outputting the signal to a transformer. According to the self-adaptive voltage gain control circuit disclosed by the invention, the output voltage swing can be automatically adjusted according to the power supply voltage, thus the power line carrier driver meets use requirements under various power supply voltages without losing the performances.
Description
Technical field
The present invention relates to a kind of driving power voltage detecting feedback regulation mechanism, what be specifically related to is a kind of power line carrier driver adaptive voltage gain control circuit.
Background technology
The power line carrier driver is accepted the fixedly amplitude of oscillation input voltage signal of prime input when using, through amplifying, filtering changes into the voltage signal of certain amplitude of oscillation, is used for driving the coupling transformer of back level.But because a variety of causes, the supply voltage of power line carrier driver can the off-design value.In such cases, if the power line carrier driver adopts fixing gain, can make that the output of power line carrier driver is saturated, when guide rail output is used, signal noise distortion ratio and the total harmonic distortion of output signal can become greatly, thereby influence the overall performance of power line carrier driver.The supply voltage that improves the power line carrier driver can address this problem, but high supply voltage can increase system power dissipation, and brings integrity problem.Be not suitable for high reliability, low-power consumption power line carrier driver.Reduce system gain and also can address this problem, same, low gain can bring the deterioration of system signal noise ratio and the linearity.For this reason, need a kind of technology, under the situation that satisfies system's operate as normal, can adjust output voltage swing automatically according to supply voltage, thereby make the power line carrier driver satisfy instructions for use under the various supply voltages, and do not lose performance.
Summary of the invention
The objective of the invention is to overcome the above problem that prior art exists, a kind of power line carrier driver adaptive voltage gain control circuit is provided, be applicable in the unsettled power line carrier driver of supply voltage.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of power line carrier driver adaptive voltage gain control circuit, comprise power supply, described power supply exports the supply voltage detection module to, described supply voltage detection module outputs to variable gain amplifier with signal, described variable gain amplifier receives input signal, described variable gain amplifier exports signal to filter, and described filter exports signal to transformer.
Further, described supply voltage detection module is converted to digital signal or analog signal with signal
The invention has the beneficial effects as follows:
The present invention can adjust output voltage swing automatically according to supply voltage, thereby makes the power line carrier driver satisfy instructions for use under the various supply voltages, and does not lose performance.When supply voltage changes, can be according to the size of supply voltage, the adjusting internal signal Amplifier Gain of corresponding correspondence, thus guarantee the power line carrier driver can be under different supply voltages the chip operate as normal.
Description of drawings
Fig. 1 is principle assumption diagram of the present invention.
Number in the figure explanation: 1, power supply, 2, the supply voltage detection module, 3, input signal, 4, variable gain amplifier, 5, filter, 6, transformer.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
With reference to shown in Figure 1, a kind of power line carrier driver adaptive voltage gain control circuit, comprise power supply 1, described power supply 1 exports supply voltage detection module 2 to, signal is converted to digital signal to described supply voltage detection module 2 or analog signal outputs to variable gain amplifier 4, described variable gain amplifier 4 receives input signal 3, and described variable gain amplifier 4 exports signal to filter 5, and described filter 5 exports signal to transformer 6.
Further, the output of supply voltage detection module 2, control variable gain amplifier 4.Make it when high voltage, have than low gain; During low voltage, has higher gain.
Claims (2)
1. power line carrier driver adaptive voltage gain control circuit, it is characterized in that: comprise power supply (1), described power supply (1) exports supply voltage detection module (2) to, described supply voltage detection module (2) outputs to variable gain amplifier (4) with signal, described variable gain amplifier (4) receives input signal (3), described variable gain amplifier (4) exports signal to filter (5), and described filter (5) exports signal to transformer (6).
2. power line carrier driver adaptive voltage gain control circuit, it is characterized in that: described supply voltage detection module (2) is converted to digital signal or analog signal with signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101936743A CN103312285A (en) | 2013-05-23 | 2013-05-23 | Self-adaptive voltage gain control circuit for power line carrier driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101936743A CN103312285A (en) | 2013-05-23 | 2013-05-23 | Self-adaptive voltage gain control circuit for power line carrier driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103312285A true CN103312285A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101936743A Pending CN103312285A (en) | 2013-05-23 | 2013-05-23 | Self-adaptive voltage gain control circuit for power line carrier driver |
Country Status (1)
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| CN (1) | CN103312285A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991600A (en) * | 2015-07-21 | 2015-10-21 | 杨永 | Power carrier wave communication line driver controlled by switch power supply constant power |
| CN114489226A (en) * | 2022-04-02 | 2022-05-13 | 新港海岸(北京)科技有限公司 | Compensation circuit and method for input and output voltage swing linearity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054761A (en) * | 2004-08-13 | 2006-02-23 | Matsushita Electric Works Ltd | Power line carrier communications apparatus |
| CN1813401A (en) * | 2003-06-27 | 2006-08-02 | 希格半导体(美国)公司 | Integrated power amplifier circuit |
| CN203423658U (en) * | 2013-05-23 | 2014-02-05 | 吴江圣博瑞信息科技有限公司 | Self-adaptive voltage gain control circuit for power line carrier wave driver |
-
2013
- 2013-05-23 CN CN2013101936743A patent/CN103312285A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813401A (en) * | 2003-06-27 | 2006-08-02 | 希格半导体(美国)公司 | Integrated power amplifier circuit |
| JP2006054761A (en) * | 2004-08-13 | 2006-02-23 | Matsushita Electric Works Ltd | Power line carrier communications apparatus |
| CN203423658U (en) * | 2013-05-23 | 2014-02-05 | 吴江圣博瑞信息科技有限公司 | Self-adaptive voltage gain control circuit for power line carrier wave driver |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991600A (en) * | 2015-07-21 | 2015-10-21 | 杨永 | Power carrier wave communication line driver controlled by switch power supply constant power |
| CN114489226A (en) * | 2022-04-02 | 2022-05-13 | 新港海岸(北京)科技有限公司 | Compensation circuit and method for input and output voltage swing linearity |
| CN114489226B (en) * | 2022-04-02 | 2022-07-01 | 新港海岸(北京)科技有限公司 | Compensation circuit and method for input and output voltage swing linearity |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |