CN104104213A - Pulse wave modulation switching circuit - Google Patents
Pulse wave modulation switching circuit Download PDFInfo
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- CN104104213A CN104104213A CN201410313748.7A CN201410313748A CN104104213A CN 104104213 A CN104104213 A CN 104104213A CN 201410313748 A CN201410313748 A CN 201410313748A CN 104104213 A CN104104213 A CN 104104213A
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Abstract
The invention discloses a pulse wave modulation switching circuit which mainly comprises a pulse wave modulation circuit, a voltage transformation circuit connected with an output end of the pulse wave modulation circuit, a switching circuit connected with an output end of the voltage transformation circuit, and an output circuit connected with an output end of the switching circuit. The pulse wave modulation switching circuit is characterized in that the pulse wave modulation circuit comprises an oscillator U, a triode transistor VT1, a capacitor C1 connected in series between a positive pole and a negative pole of an external power supply, a not gate A2 and the like; a reversed phase end of the not gate A2 is connected with the positive pole of the external power supply; a normal phase end of the not gate A2 is connected with an FB (Function Block) pin of the oscillator U; and an output end of the not gate A2 passes through an amplifier inverter K2 and then is connected with a collector electrode of the triode transistor VT1. The pulse wave modulation switching circuit is very simple in structure, low in manufacturing cost, low in electric energy loss, high in sensitivity and high in switching efficiency.
Description
Technical field
The present invention relates to a kind of change-over circuit, specifically refer to a kind of pulse wave modulation change-over circuit.
Background technology
Science and technology is constantly progressive now, the function of electronic product from strength to strength, thereby bring people very large facility in life.The electronic product major part that in life, people use all relates to change-over circuit, yet, traditional change-over circuit output signal is unstable, precision is not high, and then affect the stability that electronic product is used, and traditional change-over circuit circuit electric energy loss is large in use, circuit production cost is high, cause cost waste, these problems are to be badly in need of at present solution.
Summary of the invention
The object of the invention is to overcome the defect that the existing electric energy loss of current change-over circuit is large, circuit production cost is high, a kind of pulse wave modulation change-over circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of pulse wave modulation change-over circuit, mainly by pulse wave modulation circuit, the transforming circuit being connected with this pulse wave modulation circuit output, the change-over circuit being connected with transforming circuit output, and the output circuit being connected with change-over circuit output forms, described pulse wave modulation circuit comprises oscillator U, transistor VT1, be serially connected in the capacitor C 1 between external power source both positive and negative polarity, end of oppisite phase is connected with external power source positive pole, positive terminal is connected with the FB pin of oscillator U, the not gate A2 that output is connected with the collector electrode of transistor VT1 after inverting amplifier K2, positive terminal is connected with the CS pin of oscillator U, end of oppisite phase is connected with external power source negative pole, the not gate A1 that output is connected with the base stage of transistor VT1 after diode D1, be serially connected in the inverting amplifier K1 between the output of CS pin NAND gate A1 of oscillator U, and one end is connected with the emitter of transistor VT1, the inductance L 2 of other end ground connection, the vdd terminal of described oscillator U is connected with external power source positive pole, its GND end ground connection.
Further, described transforming circuit is by the former limit circuit that is arranged on the former limit of transformer T, and the secondary circuit composition that is arranged on transformer T secondary; Described former limit circuit is by primary coil L1, transistor VT2, and resistance R 2, and the resistance R 1 that one end is connected with the Same Name of Ends of primary coil L1, the other end is connected with external power source positive pole forms; The collector electrode of described transistor VT2 is connected with the non-same polarity of primary coil L1, and its emitter is ground connection after resistance R 2, and its base stage is directly connected with the emitter of transistor VT1.
Described secondary circuit is by secondary coil L2, the P utmost point and the diode D2 that the non-same polarity of secondary coil L2 is connected, the N utmost point is connected with change-over circuit, be serially connected in the capacitor C 4 between the N utmost point of diode D2 and the Same Name of Ends of secondary coil L2, the capacitor C that the N utmost point is connected, the other end is connected with change-over circuit 5 of one end and diode D2, and one end forms with the resistance R 3 that the Same Name of Ends of secondary coil L2 is connected, the other end is connected with change-over circuit.
Described change-over circuit comprises transducer U2, one end is connected with the RC pin of transducer U2, the resistance R 6 of other end ground connection, one end is connected with the RE pin of transducer U2, the resistance R 5 of other end ground connection after resistance R 4, and the capacitor C 6 being in parallel with resistance R 4; And the tie point of resistance R 4 and resistance R 5 is also connected with the TH pin of transducer U2; The N of described diode D2 is extremely directly connected with the CL pin of transducer U2, and the other end of capacitor C 5 is connected with the CO pin of transducer U2, and the other end of resistance R 3 is directly connected with the ENG pin of transducer U2.
Described output circuit comprises: resistance R 7, inductance L 3, transistor VT3, resistance R 8; The base stage of transistor VT3 is connected with the RC pin of transducer U2, collector electrode in turn through inductance L 3 be connected with the VC pin of transducer U2 after resistance R 7, its emitter is connected with resistance R 8, and forms output together with the tie point of the other end of resistance R 8 and resistance R 7 and inductance L 3.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) overall structure of the present invention is very simple, thereby saves circuit production cost.
(2) electric energy loss is little in use in the present invention, saves use cost.
(3) the present invention is highly sensitive, and conversion efficiency is high.
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 to this.
Embodiment
As shown in Figure 1, the present invention includes these four large parts of pulse wave modulation circuit, transforming circuit, change-over circuit and output circuit.The input of described pulse wave modulation circuit is connected with the both positive and negative polarity of external power source, and its output is connected with the input of transforming circuit.The output of transforming circuit is connected with the input of output circuit after change-over circuit, finally by the output of output circuit, is exported.
Wherein, described pulse wave modulation circuit comprises oscillator U, transistor VT1, be serially connected in the capacitor C 1 between external power source both positive and negative polarity, end of oppisite phase is connected with external power source positive pole, positive terminal is connected with the FB pin of oscillator U, the not gate A2 that output is connected with the collector electrode of transistor VT1 after inverting amplifier K2, positive terminal is connected with the CS pin of oscillator U, end of oppisite phase is connected with external power source negative pole, the not gate A1 that output is connected with the base stage of transistor VT1 after diode D1, be serially connected in the inverting amplifier K1 between the output of CS pin NAND gate A1 of oscillator U, and one end is connected with the emitter of transistor VT1, the inductance L 2 of other end ground connection, the vdd terminal of described oscillator U is connected with external power source positive pole, its GND end ground connection.
The same with traditional transforming circuit, this transforming circuit is by the former limit circuit that is arranged on the former limit of transformer T, and the secondary circuit composition that is arranged on transformer T secondary; Described former limit circuit is by primary coil L1, transistor VT2, and resistance R 2, and the resistance R 1 that one end is connected with the Same Name of Ends of primary coil L1, the other end is connected with external power source positive pole forms; The collector electrode of described transistor VT2 is connected with the non-same polarity of primary coil L1, and its emitter is ground connection after resistance R 2, and its base stage is directly connected with the emitter of transistor VT1.
Described secondary circuit is by secondary coil L2, the P utmost point and the diode D2 that the non-same polarity of secondary coil L2 is connected, the N utmost point is connected with change-over circuit, be serially connected in the capacitor C 4 between the N utmost point of diode D2 and the Same Name of Ends of secondary coil L2, the capacitor C that the N utmost point is connected, the other end is connected with change-over circuit 5 of one end and diode D2, and one end forms with the resistance R 3 that the Same Name of Ends of secondary coil L2 is connected, the other end is connected with change-over circuit.
Described change-over circuit comprises transducer U2, one end is connected with the RC pin of transducer U2, the resistance R 6 of other end ground connection, one end is connected with the RE pin of transducer U2, the resistance R 5 of other end ground connection after resistance R 4, and the capacitor C 6 being in parallel with resistance R 4; And the tie point of resistance R 4 and resistance R 5 is also connected with the TH pin of transducer U2; The N of described diode D2 is extremely directly connected with the CL pin of transducer U2, and the other end of capacitor C 5 is connected with the CO pin of transducer U2, and the other end of resistance R 3 is directly connected with the ENG pin of transducer U2.
Described output circuit comprises: resistance R 7, inductance L 3, transistor VT3, resistance R 8; The base stage of transistor VT3 is connected with the RC pin of transducer U2, collector electrode in turn through inductance L 3 be connected with the VC pin of transducer U2 after resistance R 7, its emitter is connected with resistance R 8, and forms output together with the tie point of the other end of resistance R 8 and resistance R 7 and inductance L 3.
As mentioned above, just can well realize the present invention.
Claims (4)
1. a pulse wave modulation change-over circuit, mainly by pulse wave modulation circuit, with the transforming circuit that this pulse wave modulation circuit output is connected, the change-over circuit being connected with transforming circuit output, and the output circuit being connected with change-over circuit output forms, it is characterized in that: described pulse wave modulation circuit comprises oscillator U, transistor VT1, be serially connected in the capacitor C 1 between external power source both positive and negative polarity, end of oppisite phase is connected with external power source positive pole, positive terminal is connected with the FB pin of oscillator U, the not gate A2 that output is connected with the collector electrode of transistor VT1 after inverting amplifier K2, positive terminal is connected with the CS pin of oscillator U, end of oppisite phase is connected with external power source negative pole, the not gate A1 that output is connected with the base stage of transistor VT1 after diode D1, be serially connected in the inverting amplifier K1 between the output of CS pin NAND gate A1 of oscillator U, and one end is connected with the emitter of transistor VT1, the inductance L 2 of other end ground connection, the vdd terminal of described oscillator U is connected with external power source positive pole, its GND end ground connection.
2. a kind of pulse wave modulation change-over circuit according to claim 1, is characterized in that, described transforming circuit is by the former limit circuit that is arranged on the former limit of transformer T, and the secondary circuit composition that is arranged on transformer T secondary; Described former limit circuit is by primary coil L1, transistor VT2, and resistance R 2, and the resistance R 1 that one end is connected with the Same Name of Ends of primary coil L1, the other end is connected with external power source positive pole forms; The collector electrode of described transistor VT2 is connected with the non-same polarity of primary coil L1, and its emitter is ground connection after resistance R 2, and its base stage is directly connected with the emitter of transistor VT1;
Described secondary circuit is by secondary coil L2, the P utmost point and the diode D2 that the non-same polarity of secondary coil L2 is connected, the N utmost point is connected with change-over circuit, be serially connected in the capacitor C 4 between the N utmost point of diode D2 and the Same Name of Ends of secondary coil L2, the capacitor C that the N utmost point is connected, the other end is connected with change-over circuit 5 of one end and diode D2, and one end forms with the resistance R 3 that the Same Name of Ends of secondary coil L2 is connected, the other end is connected with change-over circuit.
3. a kind of pulse wave modulation change-over circuit according to claim 2, it is characterized in that, described change-over circuit comprises transducer U2, one end is connected with the RC pin of transducer U2, the resistance R 6 of other end ground connection, one end is connected with the RE pin of transducer U2, the resistance R 5 of other end ground connection after resistance R 4, and the capacitor C 6 being in parallel with resistance R 4; And the tie point of resistance R 4 and resistance R 5 is also connected with the TH pin of transducer U2; The N of described diode D2 is extremely directly connected with the CL pin of transducer U2, and the other end of capacitor C 5 is connected with the CO pin of transducer U2, and the other end of resistance R 3 is directly connected with the ENG pin of transducer U2.
4. a kind of pulse wave modulation change-over circuit according to claim 3, is characterized in that: described output circuit comprises: resistance R 7, inductance L 3, transistor VT3, resistance R 8; The base stage of transistor VT3 is connected with the RC pin of transducer U2, collector electrode in turn through inductance L 3 be connected with the VC pin of transducer U2 after resistance R 7, its emitter is connected with resistance R 8, and forms output together with the tie point of the other end of resistance R 8 and resistance R 7 and inductance L 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313748.7A CN104104213A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313748.7A CN104104213A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation switching circuit |
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| CN104104213A true CN104104213A (en) | 2014-10-15 |
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| CN201410313748.7A Pending CN104104213A (en) | 2014-07-03 | 2014-07-03 | Pulse wave modulation switching circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562419A (en) * | 2008-04-18 | 2009-10-21 | 义隆电子股份有限公司 | Device and method for driving motor |
| CN201533187U (en) * | 2009-06-17 | 2010-07-21 | 华美电子股份有限公司 | Micro control unit intelligent PWM-controlled voltage-current type battery charger |
| CN102003688A (en) * | 2009-08-28 | 2011-04-06 | 联咏科技股份有限公司 | Light emitting diode module and driving method thereof |
| CN202012490U (en) * | 2011-01-13 | 2011-10-19 | 苏州聚力电机有限公司 | Heat radiation fan circuit structure with both low noise and high rotating speed functions |
| CN103887993A (en) * | 2012-12-20 | 2014-06-25 | 仁宝电脑工业股份有限公司 | Electronic device |
| CN204030922U (en) * | 2014-07-03 | 2014-12-17 | 宁波摩米创新工场电子科技有限公司 | A kind of pulse wave modulation change-over circuit |
-
2014
- 2014-07-03 CN CN201410313748.7A patent/CN104104213A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562419A (en) * | 2008-04-18 | 2009-10-21 | 义隆电子股份有限公司 | Device and method for driving motor |
| CN201533187U (en) * | 2009-06-17 | 2010-07-21 | 华美电子股份有限公司 | Micro control unit intelligent PWM-controlled voltage-current type battery charger |
| CN102003688A (en) * | 2009-08-28 | 2011-04-06 | 联咏科技股份有限公司 | Light emitting diode module and driving method thereof |
| CN202012490U (en) * | 2011-01-13 | 2011-10-19 | 苏州聚力电机有限公司 | Heat radiation fan circuit structure with both low noise and high rotating speed functions |
| CN103887993A (en) * | 2012-12-20 | 2014-06-25 | 仁宝电脑工业股份有限公司 | Electronic device |
| CN204030922U (en) * | 2014-07-03 | 2014-12-17 | 宁波摩米创新工场电子科技有限公司 | A kind of pulse wave modulation change-over circuit |
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Application publication date: 20141015 |