CN100505523C - Signal power amplifier and signal amplification method - Google Patents
Signal power amplifier and signal amplification method Download PDFInfo
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- CN100505523C CN100505523C CNB2006100296025A CN200610029602A CN100505523C CN 100505523 C CN100505523 C CN 100505523C CN B2006100296025 A CNB2006100296025 A CN B2006100296025A CN 200610029602 A CN200610029602 A CN 200610029602A CN 100505523 C CN100505523 C CN 100505523C
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Abstract
The present invention relates to a signal power magnifier, comprising a pulse duration modulation module which is used for producing pulse duration modulation signal and reverse pulse duration modulation signal according to the input duty ratio signal, a power magnifying module which is connected with the pulse duration modulation module and is used for magnifying the input pulse duration modulation signal and reverse pulse duration modulation signal. The present invention also relates to a signal magnifying method, comprising the following steps: step one, the pulse duration modulation module produces pulse duration modulation signal and reverse pulse duration modulation signal according to the input duty ratio signal; step two, the pulse duration modulation module transmits the pulse duration modulation signal and the reverse pulse duration modulation signal to the power magnifying module; and step three, power magnifying module drives the magnified pulse duration modulation signal and reverse pulse duration modulation signal to a deflection module. Thereby the present invention free from modulation module has the advantages of simple structure, low power consumption, low production cost and good signal magnifying efficiency of the magnifying method.
Description
Technical field
The present invention relates to a kind of signal power amplifier and method for amplifying signal, especially a kind of signal power amplifier and method for amplifying signal that utilizes pulse width modulation module to carry out pulse-width modulation.
Background technology
Along with development of times, people are also more and more higher for the requirement of work and quality of life, and are also more and more higher for the requirement of television set and display definition.Because Digital Television incomparable advantage, simulated television is progressively to the digital television transition now, and digital television to replace simulated television be a kind of inevitable.
The analog scanning chip of traditional analog television machine adopts the form that discharges and recharges, the correcting signal that the scanning chip produces is exported to signal power amplifier, but the complex structure of sort signal power amplifier, the process of method for amplifying signal is also complicated thereupon, and cost is very high, in addition, this method is not suitable for digit chip yet, is difficult to realize.
Digital correcting signal for the digital scan chip produces must use digital to analog converter, digital correcting signal is converted to analog signal inputs to the analog signal power amplifier, therefore, inevitably needs high accuracy.
So, when utilizing analog amplifier to carry out the signal amplification, the digital correcting signal that the digital scan chip produces must be carried out the D/A conversion is digital-to-analogue conversion, just can input to analog amplifier, but permissible accuracy is very high, the cost that causes is also very high, and power consumption is very big, and amplification effect is not fine.
And utilize digital power amplifier to carry out signal when amplifying, then the digital correcting signal that the digital scan chip produces just can must be inputed to digital power amplifier through ovennodulation, so also relative complex of structure, and effect neither be fine.
Summary of the invention
The objective of the invention is defective, a kind of signal power amplifier is provided at existing signal power amplifier, simple in structure, power consumption is very little and low cost of manufacture.
Another object of the present invention is the defective at existing method for amplifying signal, the method that provides a kind of signal to amplify, and the signal amplification effect is good.
For realizing above-mentioned first purpose, the invention provides a kind of signal power amplifier, comprising:
Pulse width modulation module is used for generating pulse-width signal and anti-pulse-width signal according to the duty cycle signals of input;
Power amplifier module is connected with described pulse width modulation module, is used for the pulse-width signal and the anti-pulse-width signal of input are carried out processing and amplifying;
Described pulse width modulation module comprises:
The numeral sawtooth waveforms generates submodule, is used to generate the benchmark sawtooth signal;
Comparison sub-module generates submodule with described digital sawtooth waveforms and is connected with power amplifier module, is used for sawtooth signal and duty cycle signals are compared, and the output pulse width modulation signal is given power amplifier module;
Anti-pulse-width signal generates submodule, is connected with power amplifier module with described comparison sub-module, is used for the pulse-width signal negate according to input, exports anti-pulse-width signal and gives power amplifier module.
Described power amplifier module in the technique scheme is the digital power amplification module.Described pulse width modulation module and power amplifier module are connected with second low pass filter by first low pass filter that respectively pulse-width signal and anti-pulse-width signal is carried out filtering, and described power amplifier module is the simulated power amplification module.
For realizing above-mentioned second purpose, the present invention also provides a kind of method for amplifying signal, may further comprise the steps:
Step 3, pulse-width signal and anti-pulse-width signal Driving Field deflection module that the power amplifier module utilization is amplified.
And described step 1 is specially:
This comparison sub-module compares the sawtooth signal and the duty cycle signals of input in the in addition described step 12, the generation pulse-width signal is specially: this comparison sub-module compares the sawtooth signal and the duty cycle signals of input, if duty cycle signals less than sawtooth signal, then is output as low; If duty cycle signals greater than sawtooth signal, then is output as height.
And step 2 can be specially: this pulse width modulation module sends to the digital power amplification module with this pulse-width signal and anti-pulse-width signal.Described step 2 can also be specially: step 21, and this pulse width modulation module is with this pulse-width signal and anti-pulse-width signal sends to first low-pass filtering module respectively and second low-pass filtering module carries out low-pass filtering; Step 22, first low-pass filtering module will send to the simulated power amplification module through the pulse-width signal of low-pass filtering, and second low-pass filtering module will send to the simulated power amplification module through the anti-pulse-width signal of low-pass filtering.
Therefore, signal power amplifier of the present invention is without modulation module, and is simple in structure, the very little and low cost of manufacture of power consumption, and the signal amplification effect of method for amplifying signal of the present invention is good.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of first embodiment of signal power amplifier of the present invention.
Fig. 2 is the structural representation of second embodiment of signal power amplifier of the present invention.
Fig. 3 is the flow chart of method for amplifying signal of the present invention.
Embodiment
The present invention utilizes pulse-width modulation, and (Pulse Width Modulation, PWM) module make signal power amplifier simple in structure, and the signal amplification effect is good.
As shown in Figure 1, structural representation for an embodiment of signal power amplifier of the present invention, comprise interconnected pulse width modulation module 1 and power amplifier module 2, pulse width modulation module is used for generating pulse-width signal PWM and anti-pulse-width signal PWM_N according to the duty cycle signals PWM_DATA of input; And power amplifier module 2 is used for the pulse-width signal PWM and the anti-pulse-width signal PWM_N of input are carried out processing and amplifying.
Wherein power amplifier module 2 is the digital power amplification module, and pulse width modulation module 1 comprises that digital sawtooth waveforms generates submodule 11, is used to generate benchmark sawtooth signal SAW_DATA; Comparison sub-module 12 generates submodule 11 with described digital sawtooth waveforms and is connected with power amplifier module 2, is used for sawtooth signal SAW_DATA and duty cycle signals PWM_DATA are compared, and output pulse width modulation signal PWM gives power amplifier module 2; Anti-pulse-width signal generates submodule 13, is connected with power amplifier module 2 with described comparison sub-module 12, is used for the pulse-width signal PWM negate according to input, exports anti-pulse-width signal PWM_N and gives power amplifier module 2.
As shown in Figure 2, structural representation for another embodiment of signal power amplifier of the present invention, if power amplifier module 2 is the simulated power amplification module, the pulse-width signal PWM and the anti-pulse-width signal PWM_N that then need two low-pass filtering modules, first low-pass filtering module 3 and 4 pairs of pulse width modulation modules of second low-pass filtering module 1 to produce carry out Filtering Processing respectively, and the input power amplification module 2 again.
Be that comparison sub-module 12 is connected with described power amplifier module 2 by first low-pass filtering module 3, anti-pulse-width signal generates submodule 13 and is connected with power amplifier module 2 by second low-pass filtering module 4.
So signal power amplifier of the present invention is simple in structure without modulation module, the very little and low cost of manufacture of power consumption.
And the concrete steps of method for amplifying signal of the present invention are:
Step 3, pulse-width signal and anti-pulse-width signal Driving Field deflection module that the power amplifier module utilization is amplified.
As shown in Figure 3, be the flow chart of method for amplifying signal of the present invention, detailed step is as follows:
This comparison sub-module is to the sawtooth signal SAW_DATA of input and duty cycle signals PWM_DATA when comparing, if duty cycle signals PWM_DATA less than sawtooth signal SAW_DATA, then is output as low; If duty cycle signals PWM_DATA greater than sawtooth signal SAW_DATA, then is output as height.
The above embodiments are for exporting to the digital power amplification module, if export to the simulated power amplification module then step 104 just becomes pulse width modulation module with this pulse-width signal PWM with anti-pulse-width signal PWM_N sends to first low-pass filtering module respectively and second low-pass filtering module carries out low-pass filtering; First low-pass filtering module will send to the simulated power amplification module through the pulse-width signal PWM of low-pass filtering, and second low-pass filtering module will send to the simulated power amplification module through the anti-pulse-width signal PWM_N of low-pass filtering.Referring to shown in Figure 2.
Therefore the signal amplification effect of method for amplifying signal of the present invention is very good.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (7)
1, a kind of signal power amplifier is characterized in that comprising:
Pulse width modulation module is used for generating pulse-width signal and anti-pulse-width signal according to the duty cycle signals of input;
Power amplifier module is connected with described pulse width modulation module, is used for the pulse-width signal and the anti-pulse-width signal of input are carried out processing and amplifying;
Described pulse width modulation module comprises:
The numeral sawtooth waveforms generates submodule, is used to generate the benchmark sawtooth signal;
Comparison sub-module generates submodule with described digital sawtooth waveforms and is connected with power amplifier module, is used for sawtooth signal and duty cycle signals are compared, and the output pulse width modulation signal is given power amplifier module;
Anti-pulse-width signal generates submodule, is connected with power amplifier module with described comparison sub-module, is used for the pulse-width signal negate according to input, exports anti-pulse-width signal and gives power amplifier module.
2, signal power amplifier according to claim 1 is characterized in that described power amplifier module is the digital power amplification module.
3, signal power amplifier according to claim 1, it is characterized in that described pulse width modulation module and power amplifier module, be connected with second low pass filter by first low pass filter that respectively pulse-width signal and anti-pulse-width signal is carried out filtering, described power amplifier module is the simulated power amplification module.
4, a kind of method for amplifying signal, comprising following steps:
Step 1, pulse width modulation module generates pulse-width signal and anti-pulse-width signal according to the duty cycle signals and the enabling signal of input;
Step 2, this pulse width modulation module sends to power amplifier module with this pulse-width signal and anti-pulse-width signal;
Step 3, pulse-width signal and anti-pulse-width signal Driving Field deflection module that the power amplifier module utilization is amplified;
Described step 1 is specially:
Step 11, the digital sawtooth waveforms of power amplifier module generates submodule, and adding up according to enabling signal produces the benchmark sawtooth signal and sends to comparison sub-module;
Step 12, this comparison sub-module compares the sawtooth signal and the duty cycle signals of input, generates pulse-width signal, and sends to anti-pulse-width signal generation submodule;
Step 13, this anti-pulse-width signal generates the pulse-width signal negate of submodule with input, generates anti-pulse-width signal.
5, method for amplifying signal according to claim 4, this comparison sub-module compares the sawtooth signal and the duty cycle signals of input in the wherein said step 12, the generation pulse-width signal is specially: this comparison sub-module compares the sawtooth signal and the duty cycle signals of input, if duty cycle signals less than sawtooth signal, then is output as low; If duty cycle signals greater than sawtooth signal, then is output as height.
6, according to claim 4 or 5 described method for amplifying signal, wherein said step 2 is specially: this pulse width modulation module sends to the digital power amplification module with this pulse-width signal and anti-pulse-width signal.
7, according to claim 4 or 5 described method for amplifying signal, wherein said step 2 is specially:
Step 21, this pulse width modulation module is with this pulse-width signal and anti-pulse-width signal sends to first low-pass filtering module respectively and second low-pass filtering module carries out low-pass filtering;
Step 22, first low-pass filtering module will send to the simulated power amplification module through the pulse-width signal of low-pass filtering, and second low-pass filtering module will send to the simulated power amplification module through the anti-pulse-width signal of low-pass filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100296025A CN100505523C (en) | 2006-08-01 | 2006-08-01 | Signal power amplifier and signal amplification method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100296025A CN100505523C (en) | 2006-08-01 | 2006-08-01 | Signal power amplifier and signal amplification method |
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| Publication Number | Publication Date |
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| CN101119102A CN101119102A (en) | 2008-02-06 |
| CN100505523C true CN100505523C (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100296025A Expired - Fee Related CN100505523C (en) | 2006-08-01 | 2006-08-01 | Signal power amplifier and signal amplification method |
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- 2006-08-01 CN CNB2006100296025A patent/CN100505523C/en not_active Expired - Fee Related
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