SU1453389A1 - D.c. voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used to power electronic equipment. The purpose of the invention is to reduce the noise penetrating from the input to the output of the device. The stabilizer contains a regulating transistor 1, an amplifier 2 of direct current, the terminal cascade of which is made on transistor 3, the starting generator 4 on a single junction transistor 5, two resistors 6, 7, a capacitor 8 and a stabilizer 9. In addition, the zmitter of transistor 3 is turned on resistor 10. Connecting the output of the starting generator to the emitter of the transistor 3 of the terminal stage of the DC amplifier provides a significant reduction in the penetration of interference from the input circuit into the output circuit of the stabilizer. 1 fig. I

Description

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The invention relates to electrical engineering and can be used as a source of power for electronic equipment.

The purpose of the invention is to reduce the noise penetrating from the input to the output.

The drawing shows a DC voltage regulator circuit.

The stabilizer contains a regulating transistor 1, connected to a positive power bus, a DC amplifier 2 whose terminal stage is performed on a transistor 3, a driving generator 4 on a single-junction transistor 5, two resistors (first 6, second 7), capacitor 8 and zener diode 9 In addition, a resistor 10 is included in the emitter of transistor 3.

The stabilizer works as follows.

When supply voltage is applied to the input, capacitor 8 is charged through resistors 6, 7 and 10, and the voltage of the emitter-base of the single junction transistor 5 increases. When this voltage reaches the threshold value, the single junction transistor 5 will trigger and the discharge the capacitor B on the circuit: resistor 10, the transition emitter-base unijunction transistor 5 and the load resistance of the stabilizer. At the same time, a negative voltage is formed on the emitter of the transistor 3, the transistor 3 opens and transmits current into the base of the regulating transistor 1. Transistor 1 opens, and a voltage appears at the output of the stabilizer. When this voltage increases sufficiently, a regenerative inclusion of a stabilizer occurs. Since the reference voltage created by the parametric stabilizer on the resistor 6 and the zener diode 9 is chosen to be equal to or slightly lower than the output voltage of the stabilizer, the outputs of the single transistor 5 are under equal potentials, which leads to its locking and the oscillation of the starting generator 4.

In case of a short circuit at the output of the stabilizer, the triggering generator 4 for short time intervals opens the regulating transistor 1

Upon the elimination of a short circuit, the stabilizer automatically turns on.

Since in relation to start-up. When the transistor 3 is connected to a common base circuit, the penetration of noise from the input circuit to the output circuit is reduced.

Introduction of new connections to the generator circuit and connection of its output to the emitter of the transistor of the terminal stage of the DC amplifier allowed a few dozen times

compared to the known device

to reduce the penetration of interference from the input circuit into the output circuit of the stabilizer, which is very important for powering the measuring amplifiers and other circuits of analog equipment.

Claims (1)

Invention Formula A DC voltage regulator containing a transistor included in the positive power bus of the regulation, a multi-stage DC amplifier, whose input is connected to the output pins and the terminal stage of which is opposite to the regulator, and a starting generator including a single junction transistor, two resistors and a capacitor, one of the plates connected to the emitter of the single junction transistor and to one of the terminals of one of the resistors, while second resistor connected between one of the bases of the unijunction transistor and the positive input terminal, and the collector circuit of the transistor of the terminal stage of the DC amplifier is connected With a regulating transistor base, characterized in that, in order to reduce the noise penetrating from the input to the output, a zener diode is inserted into the trigger generator, an anode connected to the common bus, and the cathode to the free output of the first resistor and to the connection point of the second resistor with one of the bases of the unijunction transistor, the second base of which is connected to the output positive terminal, and the second capacitor plate of the starting generator is connected to the output of the generator connected to the emitter 14533894 transistor terminal cascade VCH-. literal, constant, 1G