CN104410285A - Phase-shift processing based pulse modulation system by low-pass amplification - Google Patents
Phase-shift processing based pulse modulation system by low-pass amplification Download PDFInfo
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- CN104410285A CN104410285A CN201410692364.0A CN201410692364A CN104410285A CN 104410285 A CN104410285 A CN 104410285A CN 201410692364 A CN201410692364 A CN 201410692364A CN 104410285 A CN104410285 A CN 104410285A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/297—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal for conversion of frequency
Abstract
The invention discloses a phase-shift processing based pulse modulation system by low-pass amplification. The pulse modulation system mainly comprises a peak-clipping circuit, a pulse modulation circuit and a two-stage low-pass filtering amplification circuit, wherein the pulse modulation circuit is connected with the output end of the peak-clipping circuit. The pulse modulation system is characterized in that a phase-shift processing circuit is further arranged between the pulse modulation circuit and the two-stage low-pass filtering amplification circuit and comprises a phase-shift chip U2, a triode VT3, a triode VT4, a resistor R7, a polar capacitor C4, a resistor R6 and the like, wherein one end of the resistor R7 is connected with a VCC+ pin of the phase-shift chip U2 while the other end of the resistor R7 is connected with an IN1 pin of the phase-shift chip U2, a cathode of the polar capacitor C4 is connected with the pulse modulation circuit while an anode of the polar capacitor C4 is connected with an IN2 pin of the phase-shift chip U2, and one end of the resistor R6 is connected with the pulse modulation circuit while the other end of the resistor R6 is connected with the IN1 pin of the phase-shift chip U2. The phase-shift processing based pulse modulation system by low-pass amplification has the advantage that by the aid of the phase-shift processing circuit, pulse frequency can be still kept stable when the pulse modulation system outputs high power.
Description
Technical field
The present invention relates to electronic applications, specifically refer to that a kind of low pass based on phase shift process amplifies pulse wave modulation system.
Background technology
Being applied in social production and human lives of electric energy is more and more universal, and the electrical equipment adapting to various difference requirement also constantly occurs, in life, people use pulse wave modulation circuit to come to electric power supply usually, to meet the use of people to electrical equipment.But in actual use, its pulse wave frequency during pulse wave modulation circuit output high-power is also unstable, can not meet the electrical equipment demand that people increase day by day.
Summary of the invention
The object of the invention is to overcome traditional pulse wave circuit defect that its pulse wave frequency is also unstable when output high-power, provide a kind of low pass based on phase shift process to amplify pulse wave modulation system.
Object of the present invention is achieved through the following technical solutions: the low pass based on phase shift process amplifies pulse wave modulation system, mainly comprise peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, and two-stage low-pass filtering amplifying circuit, between pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit, be also provided with phase shift treatment circuit, described phase shift treatment circuit is by phase shift chip U2, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R7 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with pulse wave modulation circuit, the polar capacitor C4 that positive pole is connected with the IN2 pin of phase shift chip U2, one end is connected with pulse wave modulation circuit, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R8, the polar capacitor C6 that negative pole is connected with the collector electrode of triode VT3, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C5 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R9 that the other end is connected with the collector electrode of triode VT4, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D6 that N pole is connected with the base stage of triode VT3, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D7 that N pole is connected with the emitter of triode VT4 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U2 are connected with the sliding end of potentiometer R9, the emitter of triode VT3 is connected with the base stage of triode VT4, and the emitter of triode VT4 is all connected with two-stage low-pass filtering amplifying circuit with the positive pole of electric capacity C6.
Described peak-clipping circuit is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with pulse wave modulation circuit forms, described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2.
Described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms; Described oscillating circuit by oscillator U, the electric capacity C1 that positive pole is connected with resistance R4, negative pole is connected with the VDD pin of oscillator U, and the electric capacity C2 that positive pole is connected with the BD pin of oscillator U, negative pole is connected with the collector electrode of triode VT2 forms; The BD pin of described oscillator U is connected with the collector electrode of triode VT1, CS pin is all connected with commutation circuit with FB pin, GND pin ground connection.
Described commutation circuit is by trigger U1, and inverting amplifier D5, electric capacity C3, not gate A1, not gate A2 form, the P pole of inverting amplifier D5 is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the positive pole of electric capacity C3 is connected with resistance R5, the negative pole of negative pole NAND gate A1 is connected, the positive pole of described not gate A1 is connected with the collector electrode of triode VT2, output stage is connected with the negative pole of electric capacity C4, the negative pole of not gate A2 is connected with the CK pin of trigger U1, positive pole is connected with the Q pin of trigger U1, output stage is connected with resistance R6, the D pin of trigger U1 is connected with the FB pin of oscillator U, CK pin is connected with the negative pole of electric capacity C4.
Described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT5, triode VT6, positive pole is connected with the emitter of triode VT4, the polar capacitor C7 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R10 that the other end is connected with the positive pole of polar capacitor C7, positive pole is connected with amplifier P1 inverting input after resistance R11, the polar capacitor C8 that negative pole is connected with the negative pole of polar capacitor C7, be serially connected in the polar capacitor C9 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C10 that positive pole is connected with the base stage of triode VT5, one end is connected with the collector electrode of triode VT5, the resistance R12 that the other end is connected with the emitter of triode VT6, positive pole is connected with the base stage of triode VT6 after resistance R13, the electric capacity C11 that negative pole is connected with the emitter of triode VT5 and the positive pole of electric capacity C6 simultaneously, one end is connected with the positive pole of polar capacitor C11, the resistance R15 that the other end is connected with the inverting input of amplifier P2, the resistance R14 be in parallel with resistance R15, be serially connected in the polar capacitor C12 between the output of amplifier P2 and inverting input, and the resistance R16 be serially connected between the normal phase input end of amplifier P2 and output forms, as an output of system while the emitter of described triode VT5 is connected with polar capacitor C9 negative pole, the collector electrode of triode VT6 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is as another output of system.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts phase shift treatment circuit, and when it can make pulse wave modulation system export high-power, pulse wave frequency still can keep stable.
(2) the present invention is by the effect of peak-clipping circuit, can provide stable voltage, prevents electrical equipment from affecting result of use and useful life because of spread of voltage.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, low pass based on phase shift process of the present invention amplifies pulse wave modulation system, mainly comprise peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, and two-stage low-pass filtering amplifying circuit, between pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit, be also provided with phase shift treatment circuit.
Wherein, phase shift treatment circuit is by phase shift chip U2, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R7 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with pulse wave modulation circuit, the polar capacitor C4 that positive pole is connected with the IN2 pin of phase shift chip U2, one end is connected with pulse wave modulation circuit, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R8, the polar capacitor C6 that negative pole is connected with the collector electrode of triode VT3, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C5 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R9 that the other end is connected with the collector electrode of triode VT4, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D6 that N pole is connected with the base stage of triode VT3, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D7 that N pole is connected with the emitter of triode VT4 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U2 are connected with the sliding end of potentiometer R9, the emitter of triode VT3 is connected with the base stage of triode VT4, and the emitter of triode VT4 is all connected with two-stage low-pass filtering amplifying circuit with the positive pole of electric capacity C6.Phase shift treatment circuit, when pulse wave modulation system can be made to export high-power, pulse wave frequency still can keep stable.In order to ensure implementation result, described phase shift chip U2 is preferably LM741 integrated chip.
Peak-clipping circuit can be protected system when fluctuation occurs civil power, avoids electrical appliance to be affected.It is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with pulse wave modulation circuit forms, described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2.
Described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms; Described oscillating circuit by oscillator U, the electric capacity C1 that positive pole is connected with resistance R4, negative pole is connected with the VDD pin of oscillator U, and the electric capacity C2 that positive pole is connected with the BD pin of oscillator U, negative pole is connected with the collector electrode of triode VT2 forms; The BD pin of described oscillator U is connected with the collector electrode of triode VT1, CS pin is all connected with commutation circuit with FB pin, GND pin ground connection.
Described commutation circuit is by trigger U1, and inverting amplifier D5, electric capacity C3, not gate A1, not gate A2 form, the P pole of inverting amplifier D5 is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the positive pole of electric capacity C3 is connected with resistance R5, the negative pole of negative pole NAND gate A1 is connected, the positive pole of described not gate A1 is connected with the collector electrode of triode VT2, output stage is connected with the negative pole of electric capacity C4, the negative pole of not gate A2 is connected with the CK pin of trigger U1, positive pole is connected with the Q pin of trigger U1, output stage is connected with resistance R6, the D pin of trigger U1 is connected with the FB pin of oscillator U, CK pin is connected with the negative pole of electric capacity C4.
Described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT5, triode VT6, positive pole is connected with the emitter of triode VT4, the polar capacitor C7 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R10 that the other end is connected with the positive pole of polar capacitor C7, positive pole is connected with amplifier P1 inverting input after resistance R11, the polar capacitor C8 that negative pole is connected with the negative pole of polar capacitor C7, be serially connected in the polar capacitor C9 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C10 that positive pole is connected with the base stage of triode VT5, one end is connected with the collector electrode of triode VT5, the resistance R12 that the other end is connected with the emitter of triode VT6, positive pole is connected with the base stage of triode VT6 after resistance R13, the electric capacity C11 that negative pole is connected with the emitter of triode VT5 and the positive pole of electric capacity C6 simultaneously, one end is connected with the positive pole of polar capacitor C11, the resistance R15 that the other end is connected with the inverting input of amplifier P2, the resistance R14 be in parallel with resistance R15, be serially connected in the polar capacitor C12 between the output of amplifier P2 and inverting input, and the resistance R16 be serially connected between the normal phase input end of amplifier P2 and output forms, as an output of system while the emitter of described triode VT5 is connected with polar capacitor C9 negative pole, the collector electrode of triode VT6 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is as another output of system.By the effect of two-stage low-pass filtering amplifying circuit, the power output making system is larger, thus can meet more electrical appliance and use simultaneously.
As mentioned above, just the present invention can well be realized.
Claims (4)
1. the low pass based on phase shift process amplifies pulse wave modulation system, mainly comprise peak-clipping circuit, the pulse wave modulation circuit be connected with peak-clipping circuit output, and two-stage low-pass filtering amplifying circuit, it is characterized in that: between pulse wave modulation circuit and two-stage low-pass filtering amplifying circuit, be also provided with phase shift treatment circuit, described phase shift treatment circuit is by phase shift chip U2, triode VT3, triode VT4, one end is connected with the VCC+ pin of phase shift chip U2, the resistance R7 that the other end is connected with the IN1 pin of phase shift chip U2, negative pole is connected with pulse wave modulation circuit, the polar capacitor C4 that positive pole is connected with the IN2 pin of phase shift chip U2, one end is connected with pulse wave modulation circuit, the resistance R6 that the other end is connected with the IN1 pin of phase shift chip U2, positive pole is connected with the NC pin of phase shift chip U2 after resistance R8, the polar capacitor C6 that negative pole is connected with the collector electrode of triode VT3, positive pole is connected with the OUT pin of phase shift chip U2, the polar capacitor C5 of minus earth, one end is connected with the OUT pin of phase shift chip U2, the potentiometer R9 that the other end is connected with the collector electrode of triode VT4, P pole is connected with the OFF1 pin of phase shift chip U2, the diode D6 that N pole is connected with the base stage of triode VT3, and P pole is connected with the OFF2 pin of phase shift chip U2, the diode D7 that N pole is connected with the emitter of triode VT4 forms, VCC-pin ground connection, the OUT pin of described phase shift chip U2 are connected with the sliding end of potentiometer R9, the emitter of triode VT3 is connected with the base stage of triode VT4, and the emitter of triode VT4 is all connected with two-stage low-pass filtering amplifying circuit with the positive pole of electric capacity C6.
2. the low pass based on phase shift process according to claim 1 amplifies pulse wave modulation system, it is characterized in that: described peak-clipping circuit is by triode VT1, triode VT2, P pole after resistance R1 as an input of system, the diode D1 that N pole is connected with the base stage of triode VT1, P pole after resistance R2 as another input of system, the diode D2 that N pole is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R3 that the other end is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D2, the diode D3 that P pole is connected with the base stage of triode VT2, N pole is connected with the P pole of diode D1, the diode D4 that P pole is connected with the base stage of triode VT2, one end is connected with the emitter of triode VT1, the resistance R4 that the other end is connected with pulse wave modulation circuit, one end is connected with the emitter of triode VT2, the resistance R5 that the other end is connected with pulse wave modulation circuit forms, described triode VT1 is all connected with pulse wave modulation circuit with the collector electrode of triode VT2.
3. the low pass based on phase shift process according to claim 2 amplifies pulse wave modulation system, it is characterized in that: described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit be connected with output end of oscillating circuit forms; Described oscillating circuit by oscillator U, the electric capacity C1 that positive pole is connected with resistance R4, negative pole is connected with the VDD pin of oscillator U, and the electric capacity C2 that positive pole is connected with the BD pin of oscillator U, negative pole is connected with the collector electrode of triode VT2 forms; The BD pin of described oscillator U is connected with the collector electrode of triode VT1, CS pin is all connected with commutation circuit with FB pin, GND pin ground connection;
Described commutation circuit is by trigger U1, and inverting amplifier D5, electric capacity C3, not gate A1, not gate A2 form, the P pole of inverting amplifier D5 is connected with the CS pin of oscillator U, N pole is connected with the CK pin of trigger U1, the positive pole of electric capacity C3 is connected with resistance R5, the negative pole of negative pole NAND gate A1 is connected, the positive pole of described not gate A1 is connected with the collector electrode of triode VT2, output stage is connected with the negative pole of electric capacity C4, the negative pole of not gate A2 is connected with the CK pin of trigger U1, positive pole is connected with the Q pin of trigger U1, output stage is connected with resistance R6, the D pin of trigger U1 is connected with the FB pin of oscillator U, CK pin is connected with the negative pole of electric capacity C4.
4. the low pass based on phase shift process according to claim 3 amplifies pulse wave modulation system, it is characterized in that: described two-stage low-pass filtering amplifying circuit is by amplifier P1, amplifier P2, triode VT5, triode VT6, positive pole is connected with the emitter of triode VT4, the polar capacitor C7 of minus earth, one end is connected with the normal phase input end of amplifier P1, the resistance R10 that the other end is connected with the positive pole of polar capacitor C7, positive pole is connected with amplifier P1 inverting input after resistance R11, the polar capacitor C8 that negative pole is connected with the negative pole of polar capacitor C7, be serially connected in the polar capacitor C9 between the output of amplifier P1 and inverting input, negative pole is connected with the output of amplifier P1, the polar capacitor C10 that positive pole is connected with the base stage of triode VT5, one end is connected with the collector electrode of triode VT5, the resistance R12 that the other end is connected with the emitter of triode VT6, positive pole is connected with the base stage of triode VT6 after resistance R13, the electric capacity C11 that negative pole is connected with the emitter of triode VT5 and the positive pole of electric capacity C6 simultaneously, one end is connected with the positive pole of polar capacitor C11, the resistance R15 that the other end is connected with the inverting input of amplifier P2, the resistance R14 be in parallel with resistance R15, be serially connected in the polar capacitor C12 between the output of amplifier P2 and inverting input, and the resistance R16 be serially connected between the normal phase input end of amplifier P2 and output forms, as an output of system while the emitter of described triode VT5 is connected with polar capacitor C9 negative pole, the collector electrode of triode VT6 is connected with the normal phase input end of amplifier P2, and the output of amplifier P2 is as another output of system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410692364.0A CN104410285A (en) | 2014-11-26 | 2014-11-26 | Phase-shift processing based pulse modulation system by low-pass amplification |
| CN201510307235.XA CN104883061A (en) | 2014-11-26 | 2015-06-06 | Low-pass amplification pulse modulation system based on capacitive feedback three-point oscillating circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410692364.0A CN104410285A (en) | 2014-11-26 | 2014-11-26 | Phase-shift processing based pulse modulation system by low-pass amplification |
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| CN201410692364.0A Pending CN104410285A (en) | 2014-11-26 | 2014-11-26 | Phase-shift processing based pulse modulation system by low-pass amplification |
| CN201510307235.XA Pending CN104883061A (en) | 2014-11-26 | 2015-06-06 | Low-pass amplification pulse modulation system based on capacitive feedback three-point oscillating circuit |
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| CN104883061A (en) * | 2014-11-26 | 2015-09-02 | 成都冠深科技有限公司 | Low-pass amplification pulse modulation system based on capacitive feedback three-point oscillating circuit |
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| CN203964222U (en) * | 2014-06-04 | 2014-11-26 | 三亚江大科技发展有限公司 | A kind of new and effective spray cooling device |
| CN104410285A (en) * | 2014-11-26 | 2015-03-11 | 成都创图科技有限公司 | Phase-shift processing based pulse modulation system by low-pass amplification |
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| CN104883061A (en) * | 2014-11-26 | 2015-09-02 | 成都冠深科技有限公司 | Low-pass amplification pulse modulation system based on capacitive feedback three-point oscillating circuit |
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Application publication date: 20150311 |