CN201608649U - Pulse width modulation signal conversion voltage circuit - Google Patents
Pulse width modulation signal conversion voltage circuit Download PDFInfo
- Publication number
- CN201608649U CN201608649U CN2009202519811U CN200920251981U CN201608649U CN 201608649 U CN201608649 U CN 201608649U CN 2009202519811 U CN2009202519811 U CN 2009202519811U CN 200920251981 U CN200920251981 U CN 200920251981U CN 201608649 U CN201608649 U CN 201608649U
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- Prior art keywords
- resistance
- circuit
- operational amplifier
- capacitor
- width modulation
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Abstract
The utility model relates to a pulse width modulation signal conversion voltage circuit, which is formed by connecting a current-limiting filter circuit, an integration circuit, a reverse scaling circuit and a filter circuit. The current-limiting filter circuit is formed by connecting resistors R1 and R2 and capacitors C1 and C2; the integration circuit is formed by connecting resistors R3, R4 and R5, a capacitor C3 and an operational amplifier U1A; the reverse scaling circuit is formed by connecting resistors R6, R7, R8, R9 and R10 and an operational amplifier U1B; and the filter circuit is formed by a capacitor C4. The pulse width modulation signal conversion voltage circuit has the advantages of simple structure, reasonable design, strong practicability, high accuracy, low manufacturing cost, strong anti-interference capability, adjustable circuit, stable and reliable performance and wide applicable scope.
Description
Technical field
The utility model 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) conversion of signals potential circuit commonly used, at first, because integral element is parallel resistance on electric capacity not, gain for low frequency signal can not effectively suppress, and causes integral amplifier to enter the saturation region easily when low frequency signal is imported, and causes 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, conversion back voltage accuracy is low.
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.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, and a kind of circuit advantages of simple, performance is safe and reliable, applicability is strong pulse width modulation signal voltage converting circuit are provided.
The technical scheme that the utility model adopted 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 reverse input end of the other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, capacitor C 3, 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 beneficial effects of the utility model are: its circuit is simple, and is reasonable in design, is suitable for strong operability, the accuracy height; 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 the utility model circuit.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
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 reverse input end of the other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, capacitor C 3, 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.
Main component 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 a 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 an 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 constitutes offset signal, exports behind the direction ratio conditioned circuit that the prime signal is formed by operational amplifier U1B and resistance R 6, R7, R8, R9, R10; The 4th part is a 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 utility model general plotting, should belong within the protection range of the present utility model.
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 reverse input end of the other end connecting resistance R5 of the resistance R 3 in the described integrating circuit, capacitor C 3, 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 |
|---|---|---|---|
| CN2009202519811U CN201608649U (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal conversion voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202519811U CN201608649U (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal conversion voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201608649U true CN201608649U (en) | 2010-10-13 |
Family
ID=42953349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202519811U Expired - Lifetime CN201608649U (en) | 2009-12-25 | 2009-12-25 | Pulse width modulation signal conversion voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201608649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764511B (en) * | 2009-12-25 | 2013-01-16 | 天津诺尔哈顿电器制造有限公司 | Pulse width modulation signal voltage converting circuit |
| CN109243480A (en) * | 2018-07-02 | 2019-01-18 | 深圳市泰和安科技有限公司 | Background noise circuit and its control method are eliminated for fire-fighting system |
-
2009
- 2009-12-25 CN CN2009202519811U patent/CN201608649U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764511B (en) * | 2009-12-25 | 2013-01-16 | 天津诺尔哈顿电器制造有限公司 | Pulse width modulation signal voltage converting circuit |
| CN109243480A (en) * | 2018-07-02 | 2019-01-18 | 深圳市泰和安科技有限公司 | Background noise circuit and its control method are eliminated for fire-fighting system |
| CN109243480B (en) * | 2018-07-02 | 2021-08-20 | 深圳市泰和安科技有限公司 | Background noise eliminating circuit for fire fighting system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101013 Effective date of abandoning: 20091225 |
|
| RGAV | Abandon patent right to avoid regrant |