CN101552594B - High-fidelity power amplifying circuit in power supply regenerator - Google Patents
High-fidelity power amplifying circuit in power supply regenerator Download PDFInfo
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- CN101552594B CN101552594B CN2008100356237A CN200810035623A CN101552594B CN 101552594 B CN101552594 B CN 101552594B CN 2008100356237 A CN2008100356237 A CN 2008100356237A CN 200810035623 A CN200810035623 A CN 200810035623A CN 101552594 B CN101552594 B CN 101552594B
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Abstract
The invention provides a high-fidelity power amplifying circuit in a power supply regenerator, which comprises a first power amplifying power supply circuit, a second power amplifying power supply circuit, a low-pass filter circuit and a feedback circuit which are respectively connected with a high-fidelity power amplifying module, wherein the high-fidelity power amplifying module is used for high-fidelity amplifying input signals, the first power amplifying power supply circuit and the second power amplifying power supply circuit are used for supplying power to the high-fidelity power amplifying module, the low-pass filter circuit comprises an inductor L1 and a first resistor R19 which are connected in parallel, and the feedback circuit is used for feeding back the output of the high-fidelity power amplifying module and short-circuiting high frequency signals. The high-fidelity power amplifying circuit in the power supply regenerator can amplify the input signals in a high-fidelity way and provide high-precision output signals for the power supply regenerator.
Description
Technical field
The present invention relates to a kind of power amplification circuit, relate in particular to a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator.
Technical background
The basic function of electric power source reactivator is to become direct current behind the electric main step-down rectifier that will import, is combined into perfect sine wave by direct current again and exchanges, and then be amplified to the interchange output that voltage is equal to input.
In the prior art, for power amplification circuit, usually the mode of employing high power transistor realizes the amplification of power, the distortion of output is bigger, the equipment that needs the precision voltage source supply especially for sound equipment or meter calibration etc., the power supply of the distortion of process power amplification circuit output tends to influence significantly the precision of sound equipment tonequality or instrument.
Summary of the invention
The objective of the invention is provides a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator in order to overcome above-mentioned defective, and the signal of the amplification input that it can high-fidelity is for electric power source reactivator provides high-precision output signal.
The technical scheme that realizes above-mentioned purpose is: a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, wherein, it comprises the first amplifier power supply circuit, the second amplifier power supply circuit, low-pass filter circuit and the feedback circuit that links to each other with the high-fidelity power amplifier module respectively, wherein:
Described high-fidelity power amplifier module is used for the signal of input is carried out the amplification of high-fidelity;
The described first amplifier power supply circuit and the second amplifier power supply circuit are used for powering to the high-fidelity power amplifier module;
Described low-pass filter circuit comprises the inductance L 1 and first resistance R 19 in parallel;
Described feedback circuit is used for making the output of high-fidelity power amplifier module to feed back and with the high-frequency signal short circuit.
Above-mentioned a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, wherein, the described first amplifier power supply circuit comprises first capacitor C 1 that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, its positive pole links to each other with power supply.
Above-mentioned a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, wherein, the described second amplifier power supply circuit comprises second capacitor C 2 that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, its positive pole links to each other with power supply.
Above-mentioned a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, wherein, described high-fidelity power amplifier module also relaxes capacitor C 4 and is connected back ground connection and thinks and power on and shutoff operation provides relaxation time of length with one.
Above-mentioned a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, wherein, described feedback circuit comprises second resistance R 16, the 3rd resistance R 14 and the 3rd capacitor C 3 of series connection, series connection back ground connection, the output of this second resistance R 16 also links to each other with the high-fidelity power amplifier module, wherein:
Second resistance R 16 and the 3rd resistance R 14 are used for to feeding back from the output of high-fidelity power amplifier module;
The 3rd capacitor C 3 is used for high-frequency signal is carried out short circuit.
The invention has the beneficial effects as follows: a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator of the present invention, it is by adopting a high-fidelity power amplifier module, make the amplification sine wave signal that this power amplifier can high-fidelity, improve the precision of electric power source reactivator.
Description of drawings
Fig. 1 is a kind of circuit diagram that is used for the high-fidelity power amplifying circuit of electric power source reactivator of the present invention.
Embodiment
Below in conjunction with accompanying drawing a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator of the present invention is described further.
See also Fig. 1, a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator, it comprises the first amplifier power supply circuit 2, the second amplifier power supply circuit 3, low-pass filter circuit 5 and the feedback circuit 4 that links to each other with high-fidelity power amplifier module 1 respectively, wherein:
High-fidelity power amplifier module 1, be used for the signal of input is carried out the amplification of high-fidelity, adopted a high-fidelity power amplifier chip LM3886 in the present embodiment, its pin 1 links to each other with the first amplifier power supply circuit 2 with pin 5, pin 4 links to each other with the second amplifier power supply circuit, pin 10 is connected to a resistance R 1, pin 8 and one relaxes capacitor C 4 and is connected back ground connection and thinks and power on and shutoff operation provides relaxation time of length, pin 3 is an output, input with low-pass filter circuit and feedback circuit links to each other respectively, and pin 9 links to each other with the output of second resistance R 16;
The first amplifier power supply circuit 2 and the second amplifier power supply circuit 3 are used for to 1 power supply of high-fidelity power amplifier module, the first amplifier power supply circuit 2 comprises first capacitor C 1 that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, its positive pole links to each other with power supply, the second amplifier power supply circuit 3 comprises second capacitor C 2 that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, and its positive pole links to each other with power supply;
Low-pass filter circuit 5 comprises the inductance L 1 and first resistance R 19 in parallel.Wherein: inductance L 1 makes first resistance R 19 can give high capacitance load decoupling for high frequency provides a big induction reactance, reduces Q (quiescent point) value of the series resonance loop of capacitive load.For low frequency provides a low induction reactance 19 short circuits of first resistance R are passed to load to sine wave signal simultaneously;
Feedback circuit 4, be used for making the output of high-fidelity power amplifier module 1 to feed back and with the high-frequency signal short circuit, it comprises second resistance R 16, the 3rd resistance R 14 and the 3rd capacitor C 3 of series connection, series connection back ground connection, the output of this second resistance R 16 also links to each other with the pin 9 of high-fidelity power amplifier module 1, and wherein: second resistance R 16 and the 3rd resistance R 14 are used for to feeding back from the output of high-fidelity power amplifier module; The 3rd capacitor C 3 is used for high-frequency signal is carried out short circuit.
Though a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator of the present invention is described with reference to current instantiation, but those skilled in the art should be realized that, above example only is to be used for illustrating the present invention, also can make the variation and the modification of various equivalences under the situation that does not break away from spirit of the present invention.Therefore, if in connotation scope of the present invention to the variation of above-mentioned example, modification all will drop in the scope of claims of the present invention.
Claims (4)
1. a high-fidelity power amplifying circuit that is used for electric power source reactivator is characterized in that; It comprises the first amplifier power supply circuit, the second amplifier power supply circuit, low-pass filter circuit and the feedback circuit that links to each other with the high-fidelity power amplifier module respectively, wherein:
Described high-fidelity power amplifier module is used for the signal of input is carried out the amplification of high-fidelity;
The described first amplifier power supply circuit and the second amplifier power supply circuit are used for powering to the high-fidelity power amplifier module;
Described low-pass filter circuit comprises inductance (L1) and first resistance (R19) in parallel;
Described feedback circuit is used for the output of high-fidelity power amplifier module is fed back and with the high-frequency signal short circuit;
Described feedback circuit comprises second resistance (R16), the 3rd resistance (R14) and the 3rd electric capacity (C3) of series connection, series connection back ground connection, and the output of this second resistance (R16) also links to each other with the high-fidelity power amplifier module, wherein:
Second resistance (R16) and the 3rd resistance (R14) are used for the output of high-fidelity power amplifier module is fed back;
The 3rd electric capacity (C3) is used for high-frequency signal is carried out short circuit.
2. a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator according to claim 1 is characterized in that; The described first amplifier power supply circuit comprises first electric capacity (C1) that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, and its positive pole links to each other with power supply.
3. a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator according to claim 1 and 2 is characterized in that; The described second amplifier power supply circuit comprises second electric capacity (C2) that is used for relaxing the voltage fluctuation that causes because of impulse current of a ground connection, and its positive pole links to each other with power supply.
4. a kind of high-fidelity power amplifying circuit that is used for electric power source reactivator according to claim 1 is characterized in that; Described high-fidelity power amplifier module also relaxes electric capacity (C4) and is connected back ground connection and thinks and power on and shutoff operation provides relaxation time of length with one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100356237A CN101552594B (en) | 2008-04-03 | 2008-04-03 | High-fidelity power amplifying circuit in power supply regenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100356237A CN101552594B (en) | 2008-04-03 | 2008-04-03 | High-fidelity power amplifying circuit in power supply regenerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101552594A CN101552594A (en) | 2009-10-07 |
| CN101552594B true CN101552594B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100356237A Active CN101552594B (en) | 2008-04-03 | 2008-04-03 | High-fidelity power amplifying circuit in power supply regenerator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825476B (en) * | 2010-05-10 | 2012-03-28 | 上海信翊电气控制技术有限公司 | High-accuracy signal detection amplifying circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114798A (en) * | 1995-05-12 | 1996-01-10 | 陈国富 | Various series bridge linkage circuits and electric source filter circuit of Hi-End electron tube amplifier |
| CN2579081Y (en) * | 2002-11-08 | 2003-10-08 | 中国科学院武汉岩土力学研究所 | Low non-linear charge amplifier |
| EP1487099A2 (en) * | 2002-08-28 | 2004-12-15 | Flying Mole Corporation | Digital power amplifier |
-
2008
- 2008-04-03 CN CN2008100356237A patent/CN101552594B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114798A (en) * | 1995-05-12 | 1996-01-10 | 陈国富 | Various series bridge linkage circuits and electric source filter circuit of Hi-End electron tube amplifier |
| EP1487099A2 (en) * | 2002-08-28 | 2004-12-15 | Flying Mole Corporation | Digital power amplifier |
| CN2579081Y (en) * | 2002-11-08 | 2003-10-08 | 中国科学院武汉岩土力学研究所 | Low non-linear charge amplifier |
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| Publication number | Publication date |
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| CN101552594A (en) | 2009-10-07 |
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Owner name: STATE GRID SHANGHAI ELECTRIC POWER COMPANY Effective date: 20131126 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131126 Address after: 201620 Shanghai city Songjiang District Dragon Road No. 333 Patentee after: Shanghai University of Engineering Science Patentee after: State Grid Shanghai Municipal Electric Power Company Address before: 201620 Shanghai city Songjiang District Dragon Road No. 333 Patentee before: Shanghai University of Engineering Science |