Series voltage-stabilizing circuit used for small power type power circuit

Abstract

The invention discloses a series voltage-stabilizing circuit used for a small power type power circuit. The series voltage-stabilizing circuit comprises a voltage-stabilizing bridge circuit, wherein one output end of the voltage-stabilizing bridge circuit is connected with a collector of a Darlington tube; an emitter of the Darlington tube is led out to serve as the output end of the series voltage-stabilizing circuit; the other output end of the voltage-stabilizing bridge circuit is earthed; a base of the Darlington tube is connected with the collector by a first resistor and is connected with the emitter by a second resistor; the base of the Darlington tube and the connection end of the first resistor are connected to the earth end of the voltage-stabilizing bridge circuit; the base of the Darlington tube and the connection end of the second resistor are connected to a collector of a third triode; an emitter of the third triode is connected to the earth end of the voltage-stabilizing bridge circuit by a voltage-stabilizing tube; a base of the third triode is connected with the sliding pin end of an adjustable resistor; and the adjustable resistor is connected at the two output ends of the voltage-stabilizing bridge circuit by two fixed pin ends of the adjustable resistor. The series voltage-stabilizing circuit has a simple structure, stable and reliable properties and popularization and application values.

Description

[0001] technical field [0002] The invention belongs to a voltage stabilizing circuit, in particular to a series voltage stabilizing circuit used in a low-power power supply circuit. [0003] Background technique [0004] A voltage stabilizing circuit is a circuit that can maintain a constant output voltage when the input voltage, load, ambient temperature, circuit parameters, etc. change. This circuit can provide a stable DC power supply and is widely used in various electronic devices. [0005] Various voltage stabilizing circuits can be seen everywhere in the prior art, but most of them have complex structures, complete functions, and relatively expensive prices. The instability of the quality, and in many occasions, the functional requirements for the voltage stabilizing circuit are relatively low, as long as it meets a single voltage stabilizing function. [0006] Contents of the invention [0007] In order to overcome the deficiencies of the prior art, the objec...

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Problems solved by technology

[0005] Various voltage stabilizing circuits can be seen everywhere in the prior art, but most of them have complex structures, complete functions, and relatively expensive prices. Instability of quality, and in many occasions, the functional requirements of the voltage stabilizing circuit are relatively low, as long as it meets a single voltage stabilizing function

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