CN206877191U - A kind of multigroup reference voltage circuit - Google Patents
A kind of multigroup reference voltage circuit Download PDFInfo
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- CN206877191U CN206877191U CN201720569437.6U CN201720569437U CN206877191U CN 206877191 U CN206877191 U CN 206877191U CN 201720569437 U CN201720569437 U CN 201720569437U CN 206877191 U CN206877191 U CN 206877191U
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Abstract
Control circuit field is the utility model is related to, more particularly to a kind of multigroup reference voltage circuit.The circuit includes chip U1, amplifier U2, receiver U3, resistance R1, resistance R2, resistance R3, power supply V1, power supply V2, one end of the resistance R3 is connected with chip U1 the 6th pin, its other end connection amplifier U2 the 3rd pin, one end of the resistance R2 is connected with amplifier U2 the 4th pin, its other end is grounded, one end of the resistance R1 is connected with amplifier U2 the 4th pin, its other end is connected with receiver U3 the 3rd pin, the crus secunda of the power supply V1 input chips U1 exports the first reference voltage REF1 in the 6th pin, the 3rd pin through resistance R3 inputs U2, and through resistance R1, resistance R2 out-put supplies V2, power supply V2 input sinks U3 the 3rd pin simultaneously exports the second reference voltage REF2 in the 6th pin.The utility model simplifies circuit, saves cost.
Description
Technical field
Control circuit field is the utility model is related to, more particularly to a kind of multigroup reference voltage circuit.
Background technology
Reference voltage is called reference voltage and refers to the nothing such as one and load, power supply, temperature drift, time in circuit
Close, a constant all the time voltage can be kept.Reference voltage can be used for the voltage-stablizer of power system, and simulation numeral turns
Parallel operation and digital analog converter, and many other measurements, control system.
The reference voltage commonly used in automated production is mostly the voltages such as+10V ,+5V ,+2.5V ,+3V, is used mostly
Integrated reference voltage chip or the reference voltage level needed using LM334, TL431 electric resistance partial pressure.
+ 24V power supplys are a power supplys being in daily use in automation control circuit, and most of ginseng Voltage Reference, which examines circuit, to be needed
Power convert be+12V or 5V could circuit as the reference voltage input, be so that circuit becomes complexity and added into
This.
Using integrated chip have input voltage than it is relatively low be mostly reference voltage that 5V hardly results in+10V, to expect+
10V has to pass through amplifier amplification, it is therefore desirable to+12V or+15V power supplys, and also the voltage driven current of amplifier output is not
Very big, such that circuit becomes complicated, cost needs to increase.
Though the mu balanced circuit circuit structure being made up of LM334, TL431 is simple the precision of reference voltage, can because
The precision and temperature drift of resistance produce larger error.
Utility model content
The utility model provides a kind of multigroup reference voltage circuit, it is intended to solve conventional automated control circuit cost it is high,
The problem of error is big.
The utility model provides a kind of multigroup reference voltage circuit, including chip U1, amplifier U2, receiver U3, resistance
R1, resistance R2, resistance R3, power supply V1, power supply V2, one end of the resistance R3 are connected with chip U1 the 6th pin, its other end
Amplifier U2 the 3rd pin is connected, one end of the resistance R2 is connected with amplifier U2 the 4th pin, its other end ground connection, described
Resistance R1 one end is connected with amplifier U2 the 4th pin, and its other end is connected with receiver U3 the 3rd pin, the power supply V1
The crus secunda for inputting chip U1 exports the first reference voltage REF1 in the 6th pin, and U2 the 3rd pin is inputted through resistance R3, and through electricity
R1, resistance R2 out-put supply V2 are hindered, power supply V2 input sinks U3 the 3rd pin simultaneously exports the second reference voltage in the 6th pin
REF2。
As further improvement of the utility model, the chip U1 is Precision reference voltage chips ARD03A, described to put
Big device U2 is that the operational amplifier TS321ILT, the receiver U3 of Width funtion power supply are differential line receiver INA134UA.
As further improvement of the utility model, the resistance R1, resistance R2, resistance R3 are High Precision Low Temperature drift electricity
Resistance.
As further improvement of the utility model, the circuit includes resistance R4, one end of the resistance R4 and amplifier
U2 the first pin connection, its other end are connected with receiver U3 the 3rd pin.
As further improvement of the utility model, the circuit includes electric capacity C1 and electric capacity C2, one end of the electric capacity C1
It is connected with amplifier U2 the first pin, its other end is connected with amplifier U2 the 4th pin；One end of the electric capacity C2 and amplification
Device U2 crus secunda connection, its other end are connected with amplifier U2 the 5th pin.
As further improvement of the utility model, one end that the circuit includes electric capacity C3, the electric capacity C3 is grounded, and its is another
One end connects receiver U3 the 5th pin, the 6th pin respectively.
As further improvement of the utility model, one end that the circuit includes electric capacity C4, the electric capacity C4 is grounded, and its is another
One end connection chip U1 the 6th pin.
As further improvement of the utility model, the 3rd pin of the receiver U3 is connected with power supply V1.
As further improvement of the utility model, the power supply V1 be 24V power supply, the first reference voltage REF1
For 2.5V output reference voltage, the second reference voltage REF2 is 10V output reference voltage.
The beneficial effects of the utility model are：The utility model uses high precision electro compared with traditional reference voltage circuit
Resistance, zero temp shift differential line receiver cause the reference voltage of output to have very high precision, output+2.5V and two groups of ginsengs of+10V
Examine voltage, what is more important only needed in industry control circuit+24V power supply can just make circuit normal work without
Single+5V or+12V power supply is being designed for this, so as to simplify circuit, save cost.
Brief description of the drawings
Fig. 1 is a kind of circuit structure diagram of multigroup reference voltage circuit of the utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.
As shown in figure 1, a kind of multigroup reference voltage circuit of the present utility model includes chip U1, amplifier U2, receiver
U3, resistance R1, resistance R2, resistance R3, power supply V1, power supply V2, resistance R3 one end are connected with chip U1 the 6th pin, and its is another
End connection amplifier U2 the 3rd pin, resistance R2 one end are connected with amplifier U2 the 4th pin, its other end ground connection, resistance R1
One end be connected with amplifier U2 the 4th pin, its other end is connected with receiver U3 the 3rd pin, power supply V1 inputs chip U1
Crus secunda export the first reference voltage REF1 in the 6th pin, U2 the 3rd pin is inputted through resistance R3, and through resistance R1, resistance R2
Out-put supply V2, power supply V2 input sinks U3 the 3rd pin simultaneously export the second reference voltage REF2 in the 6th pin.
Wherein receiver U3 the 3rd pin is connected with power supply V1.
Its chips U1 is Precision reference voltage chips ARD03A, and amplifier U2 is the operational amplifier of Width funtion power supply
TS321ILT, receiver U3 are differential line receiver INA134UA.Resistance R1, resistance R2, resistance R3 float for High Precision Low Temperature
Resistance.
Power supply V1 input chips U1 crus secunda exports REF_2.5V in the 6th pin, then inputs and amplify by resistance R3 current limlitings
Device U2 the 3rd pin, then amplify by R1, R2 to obtain voltage V2, resistance R4 is mainly used in current limliting and short-circuit protection, and power supply V2 is defeated
The 3rd pin for entering receiver U3 exports REF_10V by the 6th pin.Power supply V1 is+24V power supplys, and power supply V2 is U2 output,
REF_2.5V is 2.5V output reference voltages, and REF_10V is 10V output reference voltages.
This multigroup reference voltage circuit also includes electric capacity C1, electric capacity C2, electric capacity C1 one end and amplifier U2 the first pin
Connection, its other end are connected with amplifier U2 the 4th pin；Electric capacity C2 one end is connected with amplifier U2 crus secunda, and its is another
End is connected with amplifier U2 the 5th pin.
The circuit also includes electric capacity C3, electric capacity C3 one end ground connection, its other end connect respectively receiver U3 the 5th pin,
6th pin.
The circuit also includes electric capacity C4, electric capacity C4 one end ground connection, its other end connection chip U1 the 6th pin.
The operating voltage of all devices is+24V in the utility model, has used Precision reference voltage chips U1 to obtain
2.5V voltage, add differential discharge circuit U3 and reduce due to resistance temperature ticket caused error.
The design causes the reference voltage of output with very high using precision resister, zero temp shift differential line receiver
Precision, output+2.5V and two groups of reference voltages of+10V, what is more important only need+24V power supply in industry control circuit
Circuit normal work can just be made without designing single+5V or+12V power supply for this, so as to simplify circuit, section
Cost is saved.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (9)
1. a kind of multigroup reference voltage circuit, it is characterised in that including chip U1, amplifier U2, receiver U3, resistance R1, electricity
R2, resistance R3, power supply V1, power supply V2 are hindered, one end of the resistance R3 is connected with chip U1 the 6th pin, and the connection of its other end is put
Big device U2 the 3rd pin, one end of the resistance R2 are connected with amplifier U2 the 4th pin, its other end ground connection, the resistance R1
One end be connected with amplifier U2 the 4th pin, its other end is connected with receiver U3 the 3rd pin, and the power supply V1 inputs core
Piece U1 crus secunda exports the first reference voltage REF1 in the 6th pin, and U2 the 3rd pin is inputted through resistance R3, and through resistance R1, electricity
R2 out-put supply V2 are hindered, power supply V2 input sinks U3 the 3rd pin simultaneously exports the second reference voltage REF2 in the 6th pin.
2. multigroup reference voltage circuit according to claim 1, it is characterised in that the chip U1 is Precision reference voltage
Chip ARD03A, the amplifier U2 are that the operational amplifier TS321ILT, the receiver U3 of Width funtion power supply are differential lines
Road receiver INA134UA.
3. multigroup reference voltage circuit according to claim 1, it is characterised in that the resistance R1, resistance R2, resistance R3
Resistance is floated for High Precision Low Temperature.
4. multigroup reference voltage circuit according to claim 1, it is characterised in that including resistance R4, the resistance R4's
One end is connected with amplifier U2 the first pin, and its other end is connected with receiver U3 the 3rd pin.
5. multigroup reference voltage circuit according to claim 1, it is characterised in that described including electric capacity C1 and electric capacity C2
Electric capacity C1 one end is connected with amplifier U2 the first pin, and its other end is connected with amplifier U2 the 4th pin；The electric capacity C2
One end be connected with amplifier U2 crus secunda, its other end is connected with amplifier U2 the 5th pin.
6. multigroup reference voltage circuit according to claim 1, it is characterised in that including electric capacity C3, the electric capacity C3's
One end is grounded, and its other end connects receiver U3 the 5th pin, the 6th pin respectively.
7. multigroup reference voltage circuit according to claim 1, it is characterised in that including electric capacity C4, the electric capacity C4's
One end is grounded, its other end connection chip U1 the 6th pin.
8. multigroup reference voltage circuit according to claim 1, it is characterised in that the 3rd pin of the receiver U3 and electricity
Source V1 connections.
9. multigroup reference voltage circuit according to any one of claim 1 to 8, it is characterised in that the power supply V1 is 24V
Power supply, the first reference voltage REF1 be 2.5V output reference voltage, the second reference voltage REF2 be 10V it is defeated
Go out reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720569437.6U CN206877191U (en) | 2017-05-19 | 2017-05-19 | A kind of multigroup reference voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720569437.6U CN206877191U (en) | 2017-05-19 | 2017-05-19 | A kind of multigroup reference voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206877191U true CN206877191U (en) | 2018-01-12 |
Family
ID=61340421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720569437.6U Active CN206877191U (en) | 2017-05-19 | 2017-05-19 | A kind of multigroup reference voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206877191U (en) |
-
2017
- 2017-05-19 CN CN201720569437.6U patent/CN206877191U/en active Active
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