CN101764511B - Pulse width modulation signal voltage converting circuit - Google Patents
Pulse width modulation signal voltage converting circuit Download PDFInfo
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- CN101764511B CN101764511B CN 200910245068 CN200910245068A CN101764511B CN 101764511 B CN101764511 B CN 101764511B CN 200910245068 CN200910245068 CN 200910245068 CN 200910245068 A CN200910245068 A CN 200910245068A CN 101764511 B CN101764511 B CN 101764511B
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Abstract
The invention relates to a pulse-width modulation signal voltage converting circuit. The circuit comprises a current-limited filter circuit, an integrating circuit, an inverting scaling circuit and a filter circuit which are connected, wherein the current-limited filter circuit consists of a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2 which are connected; the integrating circuit consists of a resistor R3, a resistor R4, a resistor R5, a capacitor C3 and an operational amplifier U1A which are connected; the inverting scaling circuit consists of a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and an operational amplifier U1B which are connected; and the filter circuit consists of a capacitor C4. The circuit has simple structure, reasonable design, strong practicality, high accuracy, low manufacture cost, strong interference resistance, adjustable circuit, stable and reliable performance and wide application range.
Description
Technical field
The present invention relates to a kind of changing voltage circuit, particularly a kind of pulse width modulation signal voltage converting circuit.
Background technology
At present, in pulse-width modulation (PWM) signal changing voltage circuit commonly used, at first, because integral element is parallel resistance on electric capacity not, can not establishment for the gain of low frequency signal, cause integral amplifier when low frequency signal is inputted, to enter easily the saturation region, cause conversion accuracy not high; Secondly, the not biasing of some change-over circuit, adjust amplifying element, poor to the signal adjustment capability of conversion, circuit poor for applicability, voltage accuracy is low after the conversion.
Therefore, providing a kind of simple in structure, reasonable in design, application is easy, accuracy is high pulse width modulation signal voltage converting circuit, is one of these those skilled in the art problem that should address.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, a kind of circuit advantages of simple, performance safety is reliable, applicability is strong pulse width modulation signal voltage converting circuit are provided.
The technical solution adopted in the present invention is for achieving the above object: a kind of pulse width modulation signal voltage converting circuit is characterized in that: this circuit is connected to form by limiting filter circuit, integrating circuit, reverse scale operation circuit and filter circuit; Input end signal FMC connecting resistance R1, R2 in the described limiting filter circuit, an end of capacitor C 1, another termination capacitor C 2 of resistance R 2, an end of resistance R 3, the other end ground connection of resistance R 1, capacitor C 1, C2; The other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, an end of capacitor C 3, the reverse input end of operational amplifier U1A, the positive input of resistance R 4 one termination operational amplifier U1A, its other end ground connection, the output of another termination operational amplifier of resistance R 5, capacitor C 3; The output of one termination operational amplifier U1A of the resistance R 6 in the described reverse scale operation circuit, the reverse input end of its other end connecting resistance R9, operational amplifier U1B, one termination of resistance R 7-15V power supply, the end of the other end connecting resistance R8 of resistance R 7, the positive input of operational amplifier U1B, the other end ground connection of resistance R 8, the end of the other end connecting resistance R10 of resistance R 9, output, the circuit output end of another termination operational amplifier U1B of resistance R 10; The output of one termination operational amplifier U1B of the capacitor C 4 in the described filter circuit, capacitor C 4 other end ground connection.
The invention has the beneficial effects as follows: its circuit is simple, and is reasonable in design, applicable strong operability, and accuracy is high; Low cost of manufacture be difficult for to be disturbed other circuit or disturbed by other circuit, and is stable and reliable for performance, has wide range of applications.
Description of drawings
Fig. 1 is the schematic diagram of circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for feature:
Referring to Fig. 1, a kind of pulse width modulation signal voltage converting circuit, this circuit is connected to form by limiting filter circuit, integrating circuit, reverse scale operation circuit and filter circuit; Input end signal FMC connecting resistance R1, R2 in the described limiting filter circuit, an end of capacitor C 1, another termination capacitor C 2 of resistance R 2, an end of resistance R 3, the other end ground connection of resistance R 1, capacitor C 1, C2; The other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, an end of capacitor C 3, the reverse input end of operational amplifier U1A, the positive input of resistance R 4 one termination operational amplifier U1A, its other end ground connection, the output of another termination operational amplifier of resistance R 5, capacitor C 3; The output of one termination operational amplifier U1A of the resistance R 6 in the described reverse scale operation circuit, the reverse input end of its other end connecting resistance R9, operational amplifier U1B, one termination of resistance R 7-15V power supply, the end of the other end connecting resistance R8 of resistance R 7, the positive input of operational amplifier U1B, the other end ground connection of resistance R 8, the end of the other end connecting resistance R10 of resistance R 9, output, the circuit output end of another termination operational amplifier U1B of resistance R 10; The output of one termination operational amplifier U1B of the capacitor C 4 in the described filter circuit, capacitor C 4 other end ground connection.
The main components parameter is for example selected:
The resistance of resistance parameter: R1, R2, R3 is 51K Ω, and the resistance of R4, R6, R7 is 10K Ω, and the resistance of R5 is 100K Ω, and the resistance of R8 is 82 Ω, and the resistance of R9, R10 is 15K Ω;
The capacity of capacitance parameter: C1 is 0.01 μ F, and the capacity of C2, C3 is 1 μ F, and the capacity of C4 is 1 μ F; The operational amplifier model is LM347.
Operation principle: this circuit is provided with an input, output and power supply positive-negative input end.Circuit is divided into four parts, and first is limiting filter circuit: after input signal FMC input, carry out current limliting filtering through resistance R 1, R2, capacitor C 1, C2; Second portion is integrating circuit: integrating circuit has resistance R 3, R4, R5, capacitor C 3 and operational amplifier U1A to connect to form, the relatively large resistance R 5 of parallel connection changes integral constant on capacitor C 3, lowers integration speed, when avoiding low frequency signal, integral amplifier enters saturation condition; Third part is reverse scale operation circuit: the resistance R 7 in the circuit, R8 and power supply-15V consists of offset signal, exports behind the direction ratio conditioned circuit that the prime signal forms by operational amplifier U1B and resistance R 6, R7, R8, R9, R10; The 4th part is filter circuit: the AC signal of capacitor C 4 filtering output signals.
Above-mentionedly with reference to example this pulse width modulation signal voltage converting circuit being described in detail, is illustrative rather than determinate, therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1. pulse width modulation signal voltage converting circuit is characterized in that: this circuit is by limiting filter circuit, integrating circuit, oppositely scale operation circuit and filter circuit connect to form; Input end signal FMC connecting resistance R1, R2 in the described limiting filter circuit, an end of capacitor C 1, another termination capacitor C 2 of resistance R 2, an end of resistance R 3, the other end ground connection of resistance R 1, capacitor C 1, C2; The other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, an end of capacitor C 3, the reverse input end of operational amplifier U1A, the positive input of resistance R 4 one termination operational amplifier U1A, its other end ground connection, the output of another termination operational amplifier of resistance R 5, capacitor C 3; The output of one termination operational amplifier U1A of the resistance R 6 in the described reverse scale operation circuit, the reverse input end of its other end connecting resistance R9, operational amplifier U1B, one termination of resistance R 7-15V power supply, the end of the other end connecting resistance R8 of resistance R 7, the positive input of operational amplifier U1B, the other end ground connection of resistance R 8, the end of the other end connecting resistance R10 of resistance R 9, output, the circuit output end of another termination operational amplifier U1B of resistance R 10; The output of one termination operational amplifier U1B of the capacitor C 4 in the described filter circuit, capacitor C 4 other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910245068 CN101764511B (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal voltage converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910245068 CN101764511B (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal voltage converting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN101764511A CN101764511A (en) | 2010-06-30 |
| CN101764511B true CN101764511B (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910245068 Expired - Fee Related CN101764511B (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal voltage converting circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969879A (en) * | 2012-11-13 | 2013-03-13 | 顺德职业技术学院 | Computer power supply |
| CN110031026B (en) * | 2019-04-17 | 2021-07-02 | 安菲腾(常州)光电科技有限公司 | Capacitance position sensor detection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794579A (en) * | 2006-01-12 | 2006-06-28 | 上海交通大学 | Switching frequency period modulated sawteeth wave generating circuit |
| US7170264B1 (en) * | 2006-07-10 | 2007-01-30 | Micrel, Inc. | Frequency compensation scheme for a switching regulator using external zero |
| CN201146455Y (en) * | 2008-01-25 | 2008-11-05 | 河北先控电源设备有限公司 | Circuit apparatus for modulating sine wave pulse-width |
| CN201608649U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Pulse width modulation signal conversion voltage circuit |
-
2009
- 2009-12-25 CN CN 200910245068 patent/CN101764511B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794579A (en) * | 2006-01-12 | 2006-06-28 | 上海交通大学 | Switching frequency period modulated sawteeth wave generating circuit |
| US7170264B1 (en) * | 2006-07-10 | 2007-01-30 | Micrel, Inc. | Frequency compensation scheme for a switching regulator using external zero |
| CN201146455Y (en) * | 2008-01-25 | 2008-11-05 | 河北先控电源设备有限公司 | Circuit apparatus for modulating sine wave pulse-width |
| CN201608649U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Pulse width modulation signal conversion voltage circuit |
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| CN101764511A (en) | 2010-06-30 |
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