CN219179820U - High-precision output linear stabilized voltage power supply circuit - Google Patents
High-precision output linear stabilized voltage power supply circuit Download PDFInfo
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- CN219179820U CN219179820U CN202223523716.9U CN202223523716U CN219179820U CN 219179820 U CN219179820 U CN 219179820U CN 202223523716 U CN202223523716 U CN 202223523716U CN 219179820 U CN219179820 U CN 219179820U
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- triode
- operational amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Control Of Voltage And Current In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The utility model discloses a high-precision output linear stabilized voltage power supply circuit which comprises a voltage source, a first triode, a second triode, a voltage reference diode and an operational amplifier, wherein the positive electrode of the voltage source is connected with the collector electrode of the first triode and the positive power supply end of the operational amplifier, and the negative electrode of the voltage source is connected with the negative power supply end of the operational amplifier and serves as the output negative end of the circuit; the emitter of the first triode is connected with the base electrode of the second triode, and the base electrode is connected with the collector of the second triode and the output end of the operational amplifier; the emitter of the second triode is used as the positive end of the circuit output, and a resistor is connected between the emitter and the base; the inverting input end of the operational amplifier is connected with one end of the potentiometer and the sliding end, and is connected with the emitter of the second triode through a resistor, the non-inverting input end of the operational amplifier is connected with one end of the voltage reference diode, and the other end of the voltage reference diode and the other end of the potentiometer are connected with the cathode of the voltage source. The utility model has simple debugging and high reliability and can generate high-precision output voltage.
Description
Technical Field
The utility model relates to the technical field of circuit design, in particular to a high-precision output linear voltage-stabilizing power supply circuit.
Background
In electronic circuit design application, for the application environment with higher voltage precision requirement on a power supply, a DC/DC converter is usually selected to be arranged at the input end of electric equipment, and the implementation is realized by adjusting the output voltage of the DC/DC converter. However, the DC/DC converter is often expensive, and in order to ensure that the DC/DC converter works normally, a peripheral circuit needs to be provided for the DC/DC converter, which occupies a large circuit board.
Disclosure of Invention
In order to solve the above problems, an object of the present utility model is to provide a high-precision output linear stabilized power supply circuit which uses fewer components and is capable of generating a high-precision output voltage.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
the high-precision output linear stabilized voltage power supply circuit comprises a voltage source, a first triode V1, a second triode V2, a voltage reference diode Z1 and an operational amplifier N1, wherein the positive electrode of the voltage source is connected with the collector of the first triode V1 and the positive power supply end of the operational amplifier N1, and the negative electrode of the voltage source is connected with the negative power supply end of the operational amplifier N1 and serves as the negative output end of the circuit; the emitter of the first triode V1 is connected with the base of the second triode V2, and the base is connected with the collector of the second triode V2 and the output end of the operational amplifier N1; a resistor R1 is connected between the emitter and the base of the second triode V2, and the emitter is used as the positive end of circuit output; the inverting input end of the operational amplifier N1 is connected with one end and the sliding end of the potentiometer RP1, and is connected with the emitter of the second triode V2 through a resistor R3, the non-inverting input end of the operational amplifier N1 is connected with one end of a voltage reference diode Z1, the other end of the voltage reference diode Z1 is connected with the negative electrode of a voltage source, and the other end of the potentiometer RP1 is connected with the negative electrode of the voltage source through a resistor R4; the capacitor C1 is connected between the positive end and the negative end of the circuit output.
Further, the first triode V1 and the second triode V2 are NPN type triodes.
By adopting the technical scheme, the utility model has the following advantages:
the high-precision output linear stabilized voltage power supply circuit dynamically adjusts the conduction between the collector and the emitter of the first triode V1 by monitoring the output voltage in real time, ensures that the output voltage is not influenced by the change of the input voltage and the change of the load size, and generates high-precision output voltage; the structure is simple, the cost is low, the volume is small, the maintenance is easy, the debugging is simple, the reliability is high, and the method has wide application prospect in the aspect of electronic circuit design.
Drawings
Fig. 1 is a schematic diagram of a high-precision output linear stabilized power supply circuit of the present utility model.
Detailed Description
The technical scheme of the utility model is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the high-precision output linear stabilized power supply circuit comprises a voltage source, a first triode V1, a second triode V2, a voltage reference diode Z1 and an operational amplifier N1, wherein the positive electrode +15v of the voltage source is connected with the collector of the first triode V1 and the positive power supply end v+ of the operational amplifier N1, and the negative electrode (ground end GND) is connected with the negative power supply end V-of the operational amplifier N1 and serves as the circuit output negative end (ground end GND); the emitter of the first triode V1 is connected with the base of the second triode V2, and the base is connected with the collector of the second triode V2 and the output end OUT of the operational amplifier N1; a resistor R1 is connected between the emitter and the base of the second triode V2, and the emitter is used as the positive output end +10V of the circuit; the inverting input end IN-of the operational amplifier N1 is connected with one end and a sliding end of the potentiometer RP1, and is connected with the emitter of the second triode V2 through a resistor R3, the non-inverting input end IN+ is connected with one end of a voltage reference diode Z1, the other end of the voltage reference diode Z1 is connected with the negative electrode of a voltage source, and the other end of the potentiometer RP1 is connected with the negative electrode of the voltage source through a resistor R4; the capacitor C1 is connected between the positive end and the negative end of the circuit output.
The first triode V1 and the second triode V2 are NPN type triodes; the first triode V1 is of the type TIP41C, and the second triode V2 is of the type 3DG111C.
The model of the operational amplifier N1 is LM741J/883.
The voltage reference diode Z1 described above is used with a model number 2DW234.
The utility model relates to a high-precision output linear stabilized voltage power supply circuit, which has the following working principle: the voltage reference diode Z1 provides stable reference voltage for the IN-phase input end IN+ of the operational amplifier N1, the resistor R3, the potentiometer RP1 and the resistor R4 monitor output voltage IN real time, and the divided voltage is connected into the inverting input end IN-of the operational amplifier N1 to be compared with the reference voltage; the operational amplifier N1 dynamically outputs high and low level through the output end OUT according to the comparison result to control the conduction between the collector and the emitter of the first triode V1, and voltage drop of two ends of the resistor R1 is regulated to obtain stable high-precision direct current output.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (2)
1. A high-precision output linear stabilized voltage power supply circuit is characterized in that: the circuit comprises a voltage source, a first triode V1, a second triode V2, a voltage reference diode Z1 and an operational amplifier N1, wherein the positive electrode of the voltage source is connected with the collector electrode of the first triode V1 and the positive power supply end of the operational amplifier N1, and the negative electrode of the voltage source is connected with the negative power supply end of the operational amplifier N1 and serves as the negative output end of the circuit; the emitter of the first triode V1 is connected with the base of the second triode V2, and the base is connected with the collector of the second triode V2 and the output end of the operational amplifier N1; a resistor R1 is connected between the emitter and the base of the second triode V2 and is used as a circuit output positive end; the inverting input end of the operational amplifier N1 is connected with one end and the sliding end of the potentiometer RP1, and is connected with the emitter of the second triode V2 through a resistor R3, the non-inverting input end of the operational amplifier N1 is connected with one end of a voltage reference diode Z1, the other end of the voltage reference diode Z1 is connected with the negative electrode of a voltage source, and the other end of the potentiometer RP1 is connected with the negative electrode of the voltage source through a resistor R4; the capacitor C1 is connected between the positive end and the negative end of the circuit output.
2. The high-precision output linear stabilized power supply circuit as claimed in claim 1, wherein: the first triode V1 and the second triode V2 are NPN type triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223523716.9U CN219179820U (en) | 2022-12-29 | 2022-12-29 | High-precision output linear stabilized voltage power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223523716.9U CN219179820U (en) | 2022-12-29 | 2022-12-29 | High-precision output linear stabilized voltage power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219179820U true CN219179820U (en) | 2023-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223523716.9U Active CN219179820U (en) | 2022-12-29 | 2022-12-29 | High-precision output linear stabilized voltage power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219179820U (en) |
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2022
- 2022-12-29 CN CN202223523716.9U patent/CN219179820U/en active Active
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