CN206573967U - A kind of positive and negative adjustable D.C. regulated power supply - Google Patents
A kind of positive and negative adjustable D.C. regulated power supply Download PDFInfo
- Publication number
- CN206573967U CN206573967U CN201720221353.3U CN201720221353U CN206573967U CN 206573967 U CN206573967 U CN 206573967U CN 201720221353 U CN201720221353 U CN 201720221353U CN 206573967 U CN206573967 U CN 206573967U
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- China
- Prior art keywords
- positive
- resistance
- amplifier
- power supply
- negative
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Continuous-Control Power Sources That Use Transistors (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The utility model provides a kind of positive and negative adjustable D.C. regulated power supply, power supply provides positive 2.5V reference voltages by voltage stabilizing chip TL431, the anti-phase proportional amplifier constituted again via amplifier carries out anti-phase, obtain negative 2.5V reference voltages, the fixing end of potentiometer two is sent by positive and negative 2.5V reference voltages, potentiometer mobile terminal can obtain positive 2.5V to the voltage of negative 2.5V excursions, then amplify via the power amplifier of amplifier, NPN pipes and PNP pipe composition, obtain positive 10V to the voltage output between negative 10V.Using the utility model power supply, need that input voltage size is variable, positive-negative polarity variable voltage circuit during to debugging, circuit debugging efficiency can be improved.
Description
Technical field
The utility model is related to linear direct current regulated power supply, especially a kind of positive and negative adjustable linear direct current regulated power supply,
Belong to electronic technology field.
Background technology
D.C. regulated power supply has positive direct-current voltage-stabilized power supply and negative D.C. regulated power supply, and positive direct-current voltage-stabilized power supply can only be exported just
Polar voltages, negative D.C. regulated power supply can only output negative pole voltage.In circuit debugging, it is sometimes desirable to voltage swing is variable,
The variable voltage of positive-negative polarity, in order to obtain this type voltage, it is necessary to while using positive direct-current voltage-stabilized power supply and negative direct current
Voltage-stabilized power supply, it is also desirable to artificially switch input between two kinds of power supplys, it is troublesome and poorly efficient.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of positive and negative adjustable D.C. regulated power supply, passes through
Potentiometer therein is adjusted, this power supply can provide the voltage stabilizing output that voltage swing is variable, positive-negative polarity is variable.
The concrete technical scheme that the utility model is taken is as follows：
A kind of positive and negative adjustable D.C. regulated power supply, it is characterized in that：The power supply include voltage stabilizing chip U1, amplifier U2 and U3,
NPN pipes Q1 and PNP pipe Q2, resistance R1~R7, potentiometer RV1 and Vout ports, wherein voltage stabilizing chip U1 2 pin ground connection, 1 pin
Potentiometer RV1 a fixing end, resistance R1 one end and R2 one end, resistance R1 another termination+15V power supplys are connect with 3 pin；
Amplifier U2 positive input end grounding, the anti-phase input terminating resistor R2 other end and resistance R3 one end, resistance R3's is another
Terminate potentiometer RV1 another fixing end；Amplifier U3 normal phase input end connects potentiometer RV1 mobile terminal, anti-phase input termination
Resistance R4 one end and R5 one end, resistance R4 other end ground connection, amplifier U3 output terminating resistor R6 one end and resistance
R7 one end；The NPN pipes Q1 base stage connecting resistance R6 other end, colelctor electrode connects+15V power supplys, PNP pipe Q2 base stage connecting resistance
The R7 other end, colelctor electrode connects -15V power supplys, the common connecting resistance R5 of NPN pipes Q1 and PNP pipe Q2 the emitter stage other end and Vout
Port；Voltage stabilizing chip U1 uses TL431 chips, and amplifier U2 and U3 use LM358 chips.
The beneficial effects of the utility model are：The utility model provides a kind of positive and negative adjustable D.C. regulated power supply, leads to
Potentiometer therein is overregulated, this power supply can provide the burning voltage output that voltage swing is variable, positive-negative polarity is variable, improve electricity
Road debugging efficiency.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
As shown in figure 1, this positive and negative adjustable D.C. regulated power supply, it is characterized in that：The power supply includes voltage stabilizing chip U1, amplifier
U2 and U3, NPN pipe Q1 and PNP pipe Q2, resistance R1~R7, potentiometer RV1 and Vout ports, wherein voltage stabilizing chip U1 2 pin
Ground connection, 1 pin and 3 pin connect a potentiometer RV1 fixing end, resistance R1 one end and R2 one end, and resistance R1 another termination+
15V power supplys；Amplifier U2 positive input end grounding, the anti-phase input terminating resistor R2 other end and resistance R3 one end, resistance
R3 another termination potentiometer RV1 another fixing end；Amplifier U3 normal phase input end connects potentiometer RV1 mobile terminal, anti-phase
Input terminating resistor R4 one end and R5 one end, resistance R4 other end ground connection, the one of amplifier U3 output terminating resistor R6
End and resistance R7 one end；The NPN pipes Q1 base stage connecting resistance R6 other end, colelctor electrode connects+15V power supplys, PNP pipe Q2 base
The pole connecting resistance R7 other end, colelctor electrode connects -15V power supplys, and the common connecting resistance R5's of NPN pipes Q1 and PNP pipe Q2 emitter stage is another
End and Vout ports；Voltage stabilizing chip U1 uses TL431 chips, and amplifier U2 and U3 use LM358 chips.
Voltage stabilizing is carried out by U1TL431 chips and resistance R1, positive 2.5V reference voltages are produced, positive 2.5V reference voltages give by
Amplifier U2, the anti-phase proportional amplifier of resistance R2 and R3 composition carry out anti-phase, the negative 2.5V reference voltages of generation；Positive 2.5V benchmark electricity
Pressure and negative 2.5V reference voltages give voltage-regulation potentiometer RV1 two fixing ends respectively, and RV1 mobile terminal is so as to obtaining electricity
The pressure voltage output that size is variable, positive-negative polarity is variable, voltage change range is from positive 2.5V to negative 2.5V；Send RV1 mobile terminal
Go out variable voltage to amplifier U3 normal phase input end, it is complete by amplifier U3, triode Q1 and resistance R4~R6 when positive voltage is inputted
Success rate is amplified, when negative voltage is inputted, and power amplification is completed by amplifier U3, triode Q2 and resistance R4, R5, R7, no matter positive electricity
Pressure input or negative voltage input, voltage amplification factor are all 4 times, therefore, between the exportable positive 10V in Vout ports to negative 10V
Press Shen.
Claims (2)
1. a kind of positive and negative adjustable D.C. regulated power supply, it is characterized in that：The power supply includes voltage stabilizing chip U1, amplifier U2 and U3, NPN
Pipe Q1 and PNP pipe Q2, resistance R1~R7, potentiometer RV1 and Vout ports, wherein voltage stabilizing chip U1 2 pin ground connection, 1 pin and 3 pin
Connect potentiometer RV1 a fixing end, resistance R1 one end and R2 one end, resistance R1 another termination+15V power supplys；Amplifier U2
Positive input end grounding, the anti-phase input terminating resistor R2 other end and resistance R3 one end, resistance R3 another termination electricity
Position device RV1 another fixing end；Amplifier U3 normal phase input end connects potentiometer RV1 mobile terminal, anti-phase input terminating resistor R4
One end and R5 one end, resistance R4 other end ground connection, amplifier U3 output terminating resistor R6 one end and the one of resistance R7
End；The NPN pipes Q1 base stage connecting resistance R6 other end, colelctor electrode connects+15V power supplys, and PNP pipe Q2 base stage connecting resistance R7's is another
End, colelctor electrode connects -15V power supplys, the common connecting resistance R5 of the NPN pipes Q1 and PNP pipe Q2 emitter stage other end and Vout ports.
2. the positive and negative adjustable D.C. regulated power supply of one kind according to claim 1, it is characterized in that：The voltage stabilizing chip U1 is adopted
TL431 chips are used, the amplifier U2 and U3 uses LM358 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720221353.3U CN206573967U (en) | 2017-03-08 | 2017-03-08 | A kind of positive and negative adjustable D.C. regulated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720221353.3U CN206573967U (en) | 2017-03-08 | 2017-03-08 | A kind of positive and negative adjustable D.C. regulated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206573967U true CN206573967U (en) | 2017-10-20 |
Family
ID=60057451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720221353.3U Expired - Fee Related CN206573967U (en) | 2017-03-08 | 2017-03-08 | A kind of positive and negative adjustable D.C. regulated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206573967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205955A (en) * | 2018-03-28 | 2018-06-26 | 广西职业技术学院 | A kind of teaching demonstration device of linear direct current regulated power supply |
-
2017
- 2017-03-08 CN CN201720221353.3U patent/CN206573967U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108205955A (en) * | 2018-03-28 | 2018-06-26 | 广西职业技术学院 | A kind of teaching demonstration device of linear direct current regulated power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20190308 |