CN201699609U - Novel sine wave pulse-width modulation circuit - Google Patents
Novel sine wave pulse-width modulation circuit Download PDFInfo
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- CN201699609U CN201699609U CN2010202246728U CN201020224672U CN201699609U CN 201699609 U CN201699609 U CN 201699609U CN 2010202246728 U CN2010202246728 U CN 2010202246728U CN 201020224672 U CN201020224672 U CN 201020224672U CN 201699609 U CN201699609 U CN 201699609U
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Abstract
The utility model relates to a novel sine wave pulse-width modulation circuit, which comprises a square wave generation circuit, a sine wave generation circuit and a triangular wave generation circuit and is characterized in that the output terminal of the sine wave generation circuit and the output terminal of the triangular wave generation circuit generate 50 Hz pulse signals through a modulation circuit; the pulse signals and output signals of the square wave generation circuit are output through an and gate circuit; and the output terminal of the square wave generation circuit passes a non-gate circuit and are output through an and gate circuit with the pulse signals. The utility model is simple in structure, can provide steady pulse signals of 50 Hz, and has better service value.
Description
Technical field
The utility model relates to a kind of Sine Wave Pulse Width Modulation circuit, can produce the pulse signal of 50Hz.
Background technology
In the single-phase inverter circuit, need use pulse modulation technology (be PWM modulation), and circuit requirement has stable 50Hz pulse signal, yet its frequency accuracy of signal that existing pulse-width modulation produces is not enough, and stability is not high.In addition, utilize pwm pulse to produce chip,, be subjected to the qualification of chip performance own, be difficult to obtain the pulse signal of 50Hz accurately though simplified circuit system.
Summary of the invention
In view of this, the purpose of this utility model provides a kind of novel Sine Wave Pulse Width Modulation circuit, and the stable pulse signal of 50Hz can be provided.
The utility model is to realize like this, a kind of novel Sine Wave Pulse Width Modulation circuit, comprise square wave generation circuit, sinusoidal wave generation circuit and circuit for generating triangular wave, it is characterized in that: the output of described sinusoidal wave generation circuit and circuit for generating triangular wave output produce the pulse signal of 50Hz through a modulation circuit, the output signal of this pulse signal and described square wave generation circuit is exported through an AND circuit, and the output of described square wave generation circuit is also exported through an AND circuit through a not circuit and described pulse signal.
The utility model circuit structure is simple, by the modulation of sinusoidal wave and triangular signal, produces the stable pulse signal of 50Hz, can well be used in the single-phase inverter circuit, has use value preferably.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the circuit diagram of the utility model examples of implementation.
Embodiment
As shown in Figure 1, the utility model provides a kind of novel Sine Wave Pulse Width Modulation circuit, comprise square wave generation circuit, sinusoidal wave generation circuit and circuit for generating triangular wave, it is characterized in that: the output of described sinusoidal wave generation circuit and circuit for generating triangular wave output produce the pulse signal of 50Hz through a modulation circuit, the output signal of this pulse signal and described square wave generation circuit is exported through an AND circuit, and the output of described square wave generation circuit is also exported through an AND circuit through a not circuit and described pulse signal.
In the utility model examples of implementation, described square wave generation circuit comprise the 25.6KHz of cascade successively counting unit, have square wave memory of data and A/D convertor circuit.Sinusoidal wave generation circuit comprises the counting unit of the 25.6KHz of cascade successively, the memory that has sinusoidal wave data and A/D convertor circuit.Circuit for generating triangular wave comprise the 2.56MHz of cascade successively counting unit, have triangular wave memory of data and A/D convertor circuit.The concrete Fig. 2 that sees also, Fig. 2 is a concrete circuit connection diagram, U2 wherein, the clock pulse frequency of U3 location counter is 25.6KHz, U4 location counter pulse frequency is 2.56MHz, U6C has the square wave data, U7 has sinusoidal wave data, U8 has the triangular wave data, circuit is by A/D convertor circuit U9, U10, U11 produces analog square wave signal respectively, sine wave signal and triangular signal, this sine wave signal and triangular signal produce the SPWM50Hz pulse signal by the U16 modulation, one road signal and square-wave signal and the regularity that guarantees waveform, the non-signal of one road signal and square wave and produce the opposite SPWM pulse signal of phase place guarantees the normal use of the single-phase year closet circuit in rear end.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (4)
1. novel Sine Wave Pulse Width Modulation circuit, comprise square wave generation circuit, sinusoidal wave generation circuit and circuit for generating triangular wave, it is characterized in that: the output of described sinusoidal wave generation circuit and circuit for generating triangular wave output produce the pulse signal of 50Hz through a modulation circuit, the output signal of this pulse signal and described square wave generation circuit is exported through an AND circuit, and the output of described square wave generation circuit is also exported through an AND circuit through a not circuit and described pulse signal.
2. novel Sine Wave Pulse Width Modulation circuit according to claim 1 is characterized in that: described square wave generation circuit comprise the 25.6KHz of cascade successively counting unit, have square wave memory of data and A/D convertor circuit.
3. novel Sine Wave Pulse Width Modulation circuit according to claim 1 is characterized in that: described sinusoidal wave generation circuit comprises the counting unit of the 25.6KHz of cascade successively, the memory that has sinusoidal wave data and A/D convertor circuit.
4. novel Sine Wave Pulse Width Modulation circuit according to claim 1 is characterized in that: described circuit for generating triangular wave comprise the 2.56MHz of cascade successively counting unit, have triangular wave memory of data and A/D convertor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202246728U CN201699609U (en) | 2010-06-12 | 2010-06-12 | Novel sine wave pulse-width modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202246728U CN201699609U (en) | 2010-06-12 | 2010-06-12 | Novel sine wave pulse-width modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201699609U true CN201699609U (en) | 2011-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202246728U Expired - Fee Related CN201699609U (en) | 2010-06-12 | 2010-06-12 | Novel sine wave pulse-width modulation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201699609U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978390A (en) * | 2016-03-17 | 2016-09-28 | 天宝电子（惠州）有限公司 | Pure sine wave inverter control method and device and inverter circuit |
| CN113884753A (en) * | 2021-08-17 | 2022-01-04 | 之江实验室 | Laser output power measuring circuit |
-
2010
- 2010-06-12 CN CN2010202246728U patent/CN201699609U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978390A (en) * | 2016-03-17 | 2016-09-28 | 天宝电子（惠州）有限公司 | Pure sine wave inverter control method and device and inverter circuit |
| CN105978390B (en) * | 2016-03-17 | 2019-04-16 | 天宝电子（惠州）有限公司 | A kind of pure sine wave inverter control method, device and inverter circuit |
| CN113884753A (en) * | 2021-08-17 | 2022-01-04 | 之江实验室 | Laser output power measuring circuit |
| CN113884753B (en) * | 2021-08-17 | 2024-05-03 | 之江实验室 | Laser output power measuring circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20130612 |