CN205721464U - A kind of analog voltage output circuit - Google Patents
A kind of analog voltage output circuit Download PDFInfo
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- CN205721464U CN205721464U CN201620631611.0U CN201620631611U CN205721464U CN 205721464 U CN205721464 U CN 205721464U CN 201620631611 U CN201620631611 U CN 201620631611U CN 205721464 U CN205721464 U CN 205721464U
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- operational amplifier
- resistance
- electric capacity
- analog voltage
- outfan
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Abstract
This practicality discloses a kind of analog voltage output circuit, belongs to analog voltage processing technology field.This utility model includes the first resistance to the 4th resistance, the first electric capacity, the second electric capacity, the first operational amplifier, the second operational amplifier, signal input part, signal output part.This utility model has the advantage that voltage is adjustable, range is wide.
Description
Technical field
This utility model belongs to analog voltage processing technology field, relates to a kind of analog voltage output circuit.
Background technology
Analog voltage is continually varying signal, generally sinusoidal signal in time.In existing circuit design, generally adopt
With by sending after measuring equipment data measured to external pwm signal generation equipment and being produced by external pwm signal generation equipment
Raw pwm signal, pwm signal can be used for the operation of control equipment and can also be used for the running status of feedback device, therefore by simulation
The Voltage Feedback pwm signal i.e. running status of equipment can improve runs the accuracy rate controlled, after the process by the most filtered device
Output analog voltage, and analog voltage is used for running status and the data of measurement of feedback device, therefore analog voltage is at electricity
The accuracy requirement of the transmission in road is higher, and requires good stability.
Summary of the invention
The purpose of this utility model is to there are the problems referred to above for existing technology, it is proposed that a kind of voltage is adjustable, make
With the wide analog voltage output circuit of scope.
The purpose of this utility model can be realized by following technical proposal: a kind of analog voltage output circuit, described mould
Intend voltage follower circuit and include the first resistance to the 4th resistance, the first electric capacity, the second electric capacity, the first operational amplifier, the second fortune
Calculate amplifier, signal input part, signal output part；Described signal input part is just connecting the first operational amplifier after the first resistance
Phase input, the inverting input of described first operational amplifier ground connection after the second resistance, described first operational amplifier
Outfan connects the inverting input of the first operational amplifier, the positive power source terminal warp of described first operational amplifier after the 3rd resistance
Ground connection and this positive supply termination 3V positive pole input voltage after first electric capacity, the negative power end of described first operational amplifier is through second
Ground connection and this negative supply termination 3V negative pole input voltage after electric capacity；The outfan of described first operational amplifier connects the second computing and puts
The normal phase input end of big device, the outfan of described second operational amplifier connects the inverting input of the second operational amplifier；Described
The outfan of the second operational amplifier U2 is followed by signal output part through the 4th resistance, and the outfan of described second operational amplifier depends on
Secondary ground connection after the 4th resistance, the 3rd electric capacity.
Compared with prior art, analog voltage output circuit disclosed in the utility model is provided with by operational amplifier structure
The voltage follower become, can play the effect of buffer, improves the stability of signal transmission, the electricity of analog voltage output simultaneously
Road is additionally provided with in-phase amplifier, and the resistance in adjustable circuit regulates the amplification of amplifier, makes the analog voltage of output
Size be adjustable, increase the spendable scope of analog voltage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of analog voltage output circuit.
Detailed description of the invention
The following is specific embodiment of the utility model and combine accompanying drawing, technical scheme is further retouched
State, but the present invention is not limited to these embodiments.
As it is shown in figure 1, a kind of analog voltage output circuit, described analog voltage output circuit includes the first resistance R1 to the
Four resistance R4, the first electric capacity C1, the second electric capacity C2, the first operational amplifier U1, the second operational amplifier U2, signal input part
Vin, signal output part Vout；Described signal input part Vout connects the positive input of the first operational amplifier U1 after the first resistance
End, the inverting input of described first operational amplifier U1 ground connection after the second resistance R2, described first operational amplifier U1's
Outfan connects the inverting input of the first operational amplifier U1, the positive electricity of described first operational amplifier U1 after the 3rd resistance R3
Source is ground connection and this positive supply termination 3V positive pole input voltage, the negative electricity of described first operational amplifier U2 after the first electric capacity C1
Source is ground connection and this negative supply termination 3V negative pole input voltage after the second electric capacity C2；The output of described first operational amplifier U1
The normal phase input end of end even the second operational amplifier U1, the outfan of described second operational amplifier U2 connects the second operational amplifier
The inverting input of U2；The outfan of described second operational amplifier U2 is followed by signal output part Vout through the 4th resistance R4, institute
State the outfan ground connection after the 4th resistance R4, the 3rd electric capacity C3 successively of the second operational amplifier U2.
In described analog voltage output circuit, voltage signal inputs to circuit through signal input part Vin, described voltage signal
Exporting after the amplification of the first operational amplifier U1 to the second operational amplifier U2, the second operational amplifier U2 act as voltage
Follower, is equivalent to the voltage amplifier that amplification is 1, and it act as circuit is played cushioning effect, prevents in circuit
Voltage produces sudden change and the transmission of voltage signal is produced impact.Described voltage signal after the second operational amplifier U2 again through the 4th
Export to signal output part Vout after resistance R4.The outfan of described second operational amplifier U2 is through the 4th resistance R4, the 3rd electricity
Holding ground connection after C3, wherein one end of the 3rd electric capacity C3 connects the 4th resistance R4, other end ground connection, and it act as eliminating by the second computing
The interference of the high-frequency signal in the output end voltage signal of amplifier U2, for improve the degree of accuracy of analog voltage output circuit with
And stability.
First operational amplifier U1 in circuit act as in-phase amplifier, its amplification depends on the second resistance R2
And the 3rd resistance R3, it is assumed that the voltage of the signal input part Vin input of analog voltage output circuit is Va, it is assumed that through the first fortune
Calculating the voltage after amplifier U1 amplifies is Vb, assumes that the resistance of the second resistance R2 is Ra simultaneously, and the resistance of the 3rd resistance R3 is
Rb, then can obtain relational expression:
Therefore, the first operational amplifier U1 depends on the second resistance R2 and the 3rd as the amplification of in-phase amplifier
The resistance of resistance R3, and the amplification of controlled voltage also makes this analog voltage signal export through signal output part Vout
The controllability of numerical value is higher, and the signal of this signal output part Vout output is spendable wider.
Specific embodiment described herein is only to present invention spirit explanation for example.Technology neck belonging to the present invention
Described specific embodiment can be made various amendment or supplements or use similar mode to replace by the technical staff in territory
Generation, but without departing from the spirit of the present invention or surmount scope defined in appended claims.
Claims (1)
1. an analog voltage output circuit, it is characterised in that described analog voltage output circuit includes that the first resistance is to the 4th
Resistance, the first electric capacity, the second electric capacity, the first operational amplifier, the second operational amplifier, signal input part, signal output part；Institute
State signal input part after the first resistance, connect the normal phase input end of the first operational amplifier, described first operational amplifier anti-phase
Input is ground connection after the second resistance, and the outfan of described first operational amplifier connects the first operational amplifier after the 3rd resistance
Inverting input, the positive power source terminal of described first operational amplifier after the first electric capacity ground connection and this positive supply termination 3V positive pole
Input voltage, the negative power end of described first operational amplifier is ground connection and the termination 3V negative pole input of this negative supply after the second electric capacity
Voltage；The outfan of described first operational amplifier connects the normal phase input end of the second operational amplifier, described second operation amplifier
The outfan of device connects the inverting input of the second operational amplifier；The outfan of described second operational amplifier U2 is through the 4th resistance
It is followed by signal output part, the outfan of described second operational amplifier ground connection after the 4th resistance, the 3rd electric capacity successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620631611.0U CN205721464U (en) | 2016-06-21 | 2016-06-21 | A kind of analog voltage output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620631611.0U CN205721464U (en) | 2016-06-21 | 2016-06-21 | A kind of analog voltage output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205721464U true CN205721464U (en) | 2016-11-23 |
Family
ID=57316684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620631611.0U Active CN205721464U (en) | 2016-06-21 | 2016-06-21 | A kind of analog voltage output circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205721464U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932816A (en) * | 2017-03-10 | 2017-07-07 | 成都金广通科技有限公司 | The voltage follower of Geological data collecting device |
| CN108494296A (en) * | 2017-12-26 | 2018-09-04 | 宁波兴泰科技有限公司 | A kind of position signal conversion module of servo motor |
| CN113219309A (en) * | 2021-04-14 | 2021-08-06 | 深圳供电局有限公司 | Partial discharge detection device |
| CN115389438A (en) * | 2022-10-26 | 2022-11-25 | 杭州泽天春来科技有限公司 | Spectrum appearance |
-
2016
- 2016-06-21 CN CN201620631611.0U patent/CN205721464U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932816A (en) * | 2017-03-10 | 2017-07-07 | 成都金广通科技有限公司 | The voltage follower of Geological data collecting device |
| CN108494296A (en) * | 2017-12-26 | 2018-09-04 | 宁波兴泰科技有限公司 | A kind of position signal conversion module of servo motor |
| CN113219309A (en) * | 2021-04-14 | 2021-08-06 | 深圳供电局有限公司 | Partial discharge detection device |
| CN115389438A (en) * | 2022-10-26 | 2022-11-25 | 杭州泽天春来科技有限公司 | Spectrum appearance |
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| GR01 | Patent grant |