CN104113189A - Pulse wave modulation circuit based on peak clipping processing - Google Patents
Pulse wave modulation circuit based on peak clipping processing Download PDFInfo
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- CN104113189A CN104113189A CN201410313762.7A CN201410313762A CN104113189A CN 104113189 A CN104113189 A CN 104113189A CN 201410313762 A CN201410313762 A CN 201410313762A CN 104113189 A CN104113189 A CN 104113189A
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Abstract
The invention discloses a pulse wave modulation circuit based on peak clipping processing. The circuit mainly comprises a peak clipping circuit (1), a pulse wave modulation circuit (2) connected with an output end of the peak clipping circuit (1), and a voltage transformation circuit (3) connected with the pulse wave modulation circuit (2). The circuit is characterized in that the peak clipping circuit (1) comprises a crystal triode VT1, a crystal triode VT2, a diode D1 whose P pole is connected with a resistor R1 and N pole is connected with a base electrode of the crystal triode VT1, and a diode D2 whose P pole is connected with a resistor R2 and N pole is connected with the base electrode of the crystal triode VT1. The pulse wave modulation circuit based on peak clipping processing provided by the invention can provide stable voltage and prevent an using effect and service life of an electrical appliance from being affected due to instable voltage.
Description
Technical field
The present invention relates to a kind of pulse wave modulation circuit, specifically refer to a kind of pulse wave modulation circuit based on peak clipping processing.
Background technology
Being applied in social production and human lives of electric energy is more and more universal, adapts to the various different electrical equipment requiring and also constantly occurs, in life, people come to electric power supply with pulse wave modulation circuit conventionally, to meet the use of people to electrical equipment.But in actual use, the power that can run into unavoidably the output of pulse wave modulation circuit is unstable, can cause electrical equipment normally to use in the time that power output is too low, in the time that power output is excessive, easily electrical equipment is burnt.How to design can stable output signal circuit, be to be badly in need of at present solution.
Summary of the invention
The object of the invention is to overcome traditional pulse wave circuit because design defect and cause power output unstable, the problem that causes electrical equipment normally to work has proposed a kind of pulse wave modulation circuit based on peak clipping processing.
Object of the present invention is achieved through the following technical solutions: a kind of pulse wave modulation circuit based on peak clipping processing, and mainly by peak-clipping circuit, the pulse wave modulation circuit being connected with peak-clipping circuit output, the transforming circuit being connected with pulse wave modulation circuit composition, described peak-clipping circuit is by transistor VT1, transistor VT2, the P utmost point is connected with resistance R 1, the diode D1 that the N utmost point is connected with the base stage of transistor VT1, the P utmost point is connected with resistance R 2, the diode D2 that the N utmost point is connected with the base stage of transistor VT1, one end is connected with the base stage of transistor VT1, the resistance R 3 that the other end is connected with the base stage of transistor VT2, the N utmost point is connected with resistance R 2, the diode D3 that the P utmost point is connected with the base stage of transistor VT2, the N utmost point is connected with resistance R 1, the diode D4 that the P utmost point is connected with the base stage of transistor VT2, one end is connected with the emitter of transistor VT1, the resistance R 4 that the other end is connected with pulse wave modulation circuit, and one end is connected with the emitter of transistor VT2, the resistance R 5 that the other end is connected with pulse wave modulation circuit forms, described transistor VT1 is connected with pulse wave modulation circuit respectively with the collector electrode of transistor VT2.
Further, described pulse wave modulation circuit is by oscillating circuit, and the commutation circuit being connected with output end of oscillating circuit composition; Described oscillating circuit is by oscillator U, anodal after capacitor C 2, be connected with the collector electrode of transistor VT1 with the BD pin of oscillator U respectively, negative pole after capacitor C 3, be connected with resistance R 5 and output at the not gate A1 being connected with commutation circuit, one end is connected with resistance R 4, the other end forms with the capacitor C 1 that the VDD pin of oscillator U is connected with transforming circuit respectively; GND pin ground connection, FB pin and the CS pin of described oscillator U are connected with commutation circuit respectively, and the positive pole of not gate A1 is also connected with the collector electrode of transistor VT2.
Described commutation circuit is by trigger U1, the inverting amplifier D5 that input is connected with the CS pin of oscillator U, output is connected with the CK pin of trigger U1, the not gate A2 composition that negative pole is connected with the output of inverting amplifier D5, the anodal output that is connected with the Q pin of trigger U1 is connected with transforming circuit; The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
Described transforming circuit, by transformer T1, is arranged on the former limit circuit on the former limit of transformer T1, and is arranged on the secondary circuit composition of transformer T1 secondary; Described former limit circuit comprises inductance coil L1, resistance R 6, transistor VT3 and resistance R 7, one end of described resistance R 6 is connected with capacitor C 1, the other end is connected with the Same Name of Ends of inductance coil L1, the output of the base stage NAND gate A2 of transistor VT3 is connected, collector electrode is connected with the non-same polarity of inductance coil L1 ground connection after resistance R 7 of its emitter.
Described secondary circuit comprises: inductance coil L2, capacitor C 4, diode D6 and resistance R 8, capacitor C 4 is in parallel with inductance coil L2, the P utmost point of diode D6 is connected with the non-same polarity of inductance coil L2, one end of resistance R 8 is connected with the Same Name of Ends of inductance coil L2, and the other end of resistance R 8 forms output together with the N of the diode D6 utmost point.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) the present invention can limit output voltage range, can protect electrical equipment.
(2) the present invention can provide stable voltage, prevents that electrical equipment from affecting result of use and useful life because of spread of voltage.
(3) the present invention has protective effect to electrical equipment, extends electrical equipment useful life, reduces costs.
Brief description of the drawings
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 to this.
Embodiment
As shown in Figure 1, the pulse wave modulation circuit based on peak clipping processing described in the present embodiment, mainly by peak-clipping circuit 1, the pulse wave modulation circuit 2 being connected with peak-clipping circuit 1 output, and transforming circuit 3 these three the part compositions that are connected with pulse wave modulation circuit 2.Wherein, the core point that peak-clipping circuit 1 is embodiment, it is mainly used in the high order harmonic component in cancellation voltage,, can not punctured by voltage or current peak in stable state with the voltage and current of the circuit of guaranteeing to flow through.
This peak circuit that disappears comprises transistor VT1, transistor VT2, diode D1, diode D2, diode D3, diode D4, resistance R 1, resistance R 2, resistance R 3, resistance R 4 and resistance R 5.
When connection, the P utmost point of diode D1 is connected with one end of resistance R 1, and the N utmost point of diode D1 is connected with the base stage of transistor VT1; The P utmost point of diode D2 is connected with one end of resistance R 2, and the N utmost point of diode D2 is connected with the base stage of transistor VT1; The N utmost point of diode D3 is connected with the P utmost point of diode D2 (being indirectly connected with one end of resistance R 2), and its P utmost point is connected with the base stage of transistor VT2; The N utmost point of diode D4 is connected with the P utmost point of diode D1 (being indirectly connected with one end of resistance R 1), and its P utmost point is connected with the base stage of transistor VT2; Together with the other end of the other end of resistance R 1 and resistance R 2, form input of the present invention.The base stage of transistor VT1 is connected with the base stage of transistor VT2 after resistance R 3.
Pulse wave modulation circuit 2 is by oscillating circuit, and the commutation circuit being connected with output end of oscillating circuit composition.Wherein, described oscillating circuit is by oscillator U, anodal after capacitor C 2, be connected with the collector electrode of transistor VT1 with the BD pin of oscillator U respectively, negative pole is connected with the other end of resistance R 5 and not gate A1 that output is connected with commutation circuit after capacitor C 3, and one end is connected with resistance R 4, the other end forms with the capacitor C 1 that the VDD pin of oscillator U is connected with transforming circuit 3 respectively.GND pin ground connection, FB pin and the CS pin of described oscillator U are connected with commutation circuit respectively, and the positive pole of not gate A1 is also connected with the collector electrode of transistor VT2.
Described commutation circuit is by trigger U1, the inverting amplifier D5 that input is connected with the CS pin of oscillator U, output is connected with the CK pin of trigger U1, the not gate A2 composition that negative pole is connected with the output of inverting amplifier D5, the anodal output that is connected with the Q pin of trigger U1 is connected with transforming circuit 3; The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
Transforming circuit 3 transforms for the pressure regulation of voltage, and the transforming circuit 3 of the present embodiment, by transformer T1, is arranged on the former limit circuit on the former limit of transformer T1, and is arranged on the secondary circuit composition of transformer T1 secondary.Wherein, described former limit circuit comprises inductance coil L1, resistance R 6, transistor VT3 and resistance R 7, one end of resistance R 6 is connected with capacitor C 1, the other end is connected with the Same Name of Ends of inductance coil L1, the output of the base stage NAND gate A2 of transistor VT3 is connected, collector electrode is connected with the non-same polarity of inductance coil L1 ground connection after resistance R 7 of its emitter.
Described secondary circuit comprises: inductance coil L2, capacitor C 4, diode D6 and resistance R 8, capacitor C 4 is in parallel with inductance coil L2, the P utmost point of diode D6 is connected with the non-same polarity of inductance coil L2, one end of resistance R 8 is connected with the Same Name of Ends of inductance coil L2, and the other end of resistance R 8 forms output together with the N of the diode D6 utmost point.
When use, external voltage acts on the input being made up of resistance R 1 and resistance R 2, the voltage inputted is first through the peak circuit that the disappears peak processing that disappears, process through pulse wave modulation circuit again, boost or step-down processing finally by transforming circuit, thereby guarantee to obtain desirable magnitude of voltage and current value.
As mentioned above, just can well realize the present invention.
Claims (3)
1. the pulse wave modulation circuit based on peak clipping processing, mainly by peak-clipping circuit (1), the pulse wave modulation circuit (2) being connected with peak-clipping circuit (1) output, the transforming circuit (3) being connected with pulse wave modulation circuit (2) composition, it is characterized in that: described peak-clipping circuit (1) is by transistor VT1, transistor VT2, the P utmost point is connected with resistance R 1, the diode D1 that the N utmost point is connected with the base stage of transistor VT1, the P utmost point is connected with resistance R 2, the diode D2 that the N utmost point is connected with the base stage of transistor VT1, one end is connected with the base stage of transistor VT1, the resistance R 3 that the other end is connected with the base stage of transistor VT2, the N utmost point is connected with resistance R 2, the diode D3 that the P utmost point is connected with the base stage of transistor VT2, the N utmost point is connected with resistance R 1, the diode D4 that the P utmost point is connected with the base stage of transistor VT2, one end is connected with the emitter of transistor VT1, the resistance R 4 that the other end is connected with pulse wave modulation circuit (2), and one end is connected with the emitter of transistor VT2, the other end forms with the resistance R 5 that pulse wave modulation circuit (2) is connected, described transistor VT1 is connected with pulse wave modulation circuit (2) respectively with the collector electrode of transistor VT2.
2. a kind of pulse wave modulation circuit based on peak clipping processing according to claim 1, is characterized in that: described pulse wave modulation circuit (2) is by oscillating circuit, and the commutation circuit being connected with output end of oscillating circuit composition; Described oscillating circuit is by oscillator U, anodal after capacitor C 2, be connected with the collector electrode of transistor VT1 with the BD pin of oscillator U respectively, negative pole after capacitor C 3, be connected with resistance R 5 and output at the not gate A1 being connected with commutation circuit, one end is connected with resistance R 4, the other end forms with the capacitor C 1 that transforming circuit (3) is connected with the VDD pin of oscillator U respectively; GND pin ground connection, FB pin and the CS pin of described oscillator U are connected with commutation circuit respectively, and the positive pole of not gate A1 is also connected with the collector electrode of transistor VT2;
Described commutation circuit is by trigger U1, the inverting amplifier D5 that input is connected with the CS pin of oscillator U, output is connected with the CK pin of trigger U1, the not gate A2 composition that negative pole is connected with the output of inverting amplifier D5, the anodal output that is connected with the Q pin of trigger U1 is connected with transforming circuit (3); The output of the CK pin NAND gate A1 of described trigger U1 is connected, D pin is connected with the FB pin of oscillator U.
3. a kind of pulse wave modulation circuit based on peak clipping processing according to claim 2, it is characterized in that: described transforming circuit (3) is by transformer T1, be arranged on the former limit circuit on the former limit of transformer T1, and be arranged on the secondary circuit composition of transformer T1 secondary; Described former limit circuit comprises inductance coil L1, resistance R 6, transistor VT3 and resistance R 7, one end of described resistance R 6 is connected with capacitor C 1, the other end is connected with the Same Name of Ends of inductance coil L1, the output of the base stage NAND gate A2 of transistor VT3 is connected, collector electrode is connected with the non-same polarity of inductance coil L1 ground connection after resistance R 7 of its emitter;
Described secondary circuit comprises: inductance coil L2, capacitor C 4, diode D6 and resistance R 8, capacitor C 4 is in parallel with inductance coil L2, the P utmost point of diode D6 is connected with the non-same polarity of inductance coil L2, one end of resistance R 8 is connected with the Same Name of Ends of inductance coil L2, and the other end of resistance R 8 forms output together with the N of the diode D6 utmost point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410313762.7A CN104113189A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation circuit based on peak clipping processing |
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| CN201410313762.7A CN104113189A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation circuit based on peak clipping processing |
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| CN201410313762.7A Pending CN104113189A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation circuit based on peak clipping processing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979342A (en) * | 2017-11-23 | 2018-05-01 | 西安电子科技大学 | The electromagnetic interference compensation circuit of integrated circuit |
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| CN2197474Y (en) * | 1994-07-16 | 1995-05-17 | 崔笑飞 | Magnetic induction initiator |
| US6091218A (en) * | 1998-11-04 | 2000-07-18 | Ritch; Harold D. | Energy conservation circuit and method for use with multi-phase motors used to power a variable load |
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Application publication date: 20141022 |