SU903832A2

SU903832A2 - Voltage stabilizer

Info

Publication number: SU903832A2
Application number: SU802923378A
Authority: SU
Inventors: Юрий Феодосьевич Химерик; Соломон Аронович Керцман; Виталий Яковлевич Кирсей
Original assignee: Предприятие П/Я А-3361
Priority date: 1980-05-13
Filing date: 1980-05-13
Publication date: 1982-02-07

Description

II

Изобретение относитс к стабилизированным источникам электропитани This invention relates to stabilized power supplies.

По основному авт. св. № 377750. известен стабилизатор напр жени , содержащий последовательный регул тор, состо щий из основного, дополнитель-v ного и согласующего транзисторов, усилител посто нного тока, схемы сравнени и токостабилизиругощего двухпо1 люсника на транзисторе, база которого соединена с базой дополнительного транзистора, а эмиттер через резистор подключен к эмиттеру дополнительного транзистора, соединенному с вход ной шиной ГО According to the main author. St. No. 377750. A voltage regulator is known that includes a series regulator consisting of a main, auxiliary and matching transistors, a DC amplifier, a comparison circuit and a current stabilized two pole on a transistor, the base of which is connected to the base of the additional transistor, and the emitter through a resistor connected to the emitter of the additional transistor connected to the input bus GO

Недостаток известного стабилизатора невысока стабильность выходного напр жени при изменении питающего напр ххени и ненадежный запуск стабилизатора при выполнении схегш на кремниевых транзисторах с малыми значени ми обратных токов.The disadvantage of the known stabilizer is the low stability of the output voltage when the supply voltage changes, and the unreliable start of the stabilizer is performed on silicon transistors with low reverse currents.

Цель изобретени - повьииение стабильности выходного напр жени иThe purpose of the invention is to increase the stability of the output voltage and

обеспечение надежного запуска стабилизатора .ensuring reliable start of the stabilizer.

Поставленна цель достигаетс тем, что в стабилизатор введены резистор, стабилитрон и разв зывающий диод, при этом последовательно соединенные резистор и стабилитрон включены между эмиттером транзистора токостабилизирующего двухполюсника и общей шиной , а точка соединени резистора и стабилитрона через разв зывающий диод подключена к базе согласующего транзистора.The goal is achieved by introducing a resistor, a zener diode and a decoupling diode into the stabilizer, with the series-connected resistor and the zener diode being connected between the emitter of the current-stabilizing two-pole transistor and the common bus, and the connection point of the resistor and the zener diode is connected to the base of the matching transistor through an uncoupling diode.

На чертеже приведена принципиальна электрическа схема стабилизатора напр жени .The drawing shows a circuit diagram of a voltage regulator.

Claims

The voltage regulator contains a composite regulator 1, consisting of a main 2, an additional 3 and a matching 4 transistors, a current-stabilizing two-terminal 5, made on transistor 6, a resistor 7, and a nonlinear element used as an emitter-trans junction of the resistor 3, the amplifying transistor of the feedback circuit 8 and the source of the reference voltage to the stabilizer 9, the trigger circuit consisting of a stabilizer 10, a separation diode 11 and a current-carrying resistor 12. The stabilizer n Amplifier works as follows. When the stabilizer is turned on, a voltage appears on the Zener diode 10, which through the separation diode 11 enters the connection point of the base of the matching transistor k with the collectors of the current stabilizer 6 transistors and feedback amplifier 8, which provides the best conditions for starting the stabilizer, t . the appearance of a voltage in its output. When a given output voltage level is reached, the separation diode 11 is closed due to the reverse voltage due to the potential difference between the stabilization voltage of the Zener diode 10 and the sum of the output voltage of the stabilizer and emitter-base transitions The main 2 and matching k transistors. Changes in the input power of its voltage lead to changes in current through the emitter resistor 7, the current supply resistor 12 and the Zener diode 10. The polarity of the voltage increment on the resistor 7, such that the two-port current stabilizing changes its dynamic resistance and, therefore, the base potential of the transistor k of the regulator 1 in the direction preventing changes in the output voltage, thereby increasing the stability of the output voltage of the stabilizer. Compared to the known, this stabilizer has a better output voltage stability and reliable start of the stabilizer. Claims of the invention Stabilizer for example on the author. If 377750, characterized in that, in order to improve the stability of the output voltage and to ensure reliable starting, a resistor, a zener diode and a coupling diode are inserted into it, the series-connected resistor and the zener diode being connected between the emitter of the current-stabilizing two-pole transistor and the common bus, The connection point of the resistor and the Zener diode is connected to the base of the matching transistor through an isolation diode. Sources of information taken into account in the examination 1. USSR author's certificate N 377750, cl. G 05 F 1/56, 1973.