SU960774A1

SU960774A1 - Dc voltage stabilizer

Info

Publication number: SU960774A1
Application number: SU762412905A
Authority: SU
Inventors: Владимир Ильич Турченков
Original assignee: За витель
Priority date: 1976-10-18
Filing date: 1976-10-18
Publication date: 1982-09-23

Description

' Изобретение относится к электротехнике и может быть использовано для питания электронной и медицинской аппаратуры, в частности в приборе для нахождения активных биологических точек человека.'' The invention relates to electrical engineering and can be used to power electronic and medical equipment, in particular in a device for finding active biological points of a person.

Известен стабилизатор напряжения постоянного тока, содержащий регулирующий элемент, опорный элемент, резистор смещения, узел защиты fl].Known DC voltage stabilizer containing a control element, a support element, a bias resistor, a protection unit fl].

Однако у известного стабилизатора недостаточно широкий диапазон изменения тока нагрузки в области микроамперных токов и отсутствует ступенчатое уменьшение тока потребления при перегрузке.However, the known stabilizer does not have a sufficiently wide range of changes in the load current in the region of microampere currents and there is no stepwise decrease in the consumption current during overload.

Известен также стабилизатор напряжения постоянного тока, содержащий регулирующий элемент на двух транзисторах разного типа проводимости, включенный между входными выходным' выводами стабилизатора, опорный элемент на стабилитроне, подключенный одним выводом к общему выводу стабилизатора,резистор смещения регулирующего элемента, подключенный одним выводом к общему выводу стабилизатора, пороговый элемент на кремневом диоде, подключенный одним выводом к выходному стабилизатору [2].Also known is a DC voltage stabilizer containing a regulating element on two transistors of different types of conductivity, connected between the input output 'terminals of the stabilizer, a supporting element on the zener diode, connected by one output to the common output of the stabilizer, a bias resistor of the regulatory element connected by one output to the common output of the stabilizer , a threshold element on a silicon diode connected by one output to the output stabilizer [2].

' Недостатком стабилизатора является отсутствие ступенчатогд уменьшения тока потребления при перегрузке.'The disadvantage of the stabilizer is the lack of stepwise reduction of current consumption during overload.

Цель изобретения - обеспечение ступенчатого уменьшения тока потребления при перегрузке.The purpose of the invention is the provision of stepwise reduction of the current consumption during overload.

Поставленная цель достигается тем, что в стабилизаторе транзисторы ре10 гулирующего элемента соединены последовательно, эмиттеры их объединены, при этом база входного транзистора соединена с другими выводами резистора смещения и порогового элемента, а база выходного транзистора ’5 соединена с другим выводом опорного элемента.This goal is achieved by the fact that in the stabilizer, the transistors of the control element are connected in series, their emitters are combined, while the base of the input transistor is connected to other terminals of the bias resistor and threshold element, and the base of the output transistor ’5 is connected to another terminal of the reference element.

На чертеже представлена принци__п пиальная электрическая схема стаби• лизатора напряжения.The drawing shows printsi_ _n pial the stabilizer circuitry • recuperators voltage.

Стабилизатор содержит регулирующие транзисторы 1 и 2 п-р-п и р-п-р типа, соединенные последовательно, с объединенными эмиттерами, включен25 ные между источником питания и нагрузкой, опорный стабилитрон 3, резистор 4 смещения входного регулирующего транзистора 1, пороговый элемент 5 на кремниевых диодах б и 7, включенных последовательно между ба3 зой входного транзистора 1 и нагрузкой.The stabilizer contains control transistors 1 and 2 of the p-p-p and p-p-p type, connected in series with combined emitters, connected 25 between the power source and the load, a reference zener diode 3, a bias resistor 4 of the input control transistor 1, a threshold element 5 on silicon diodes b and 7, connected in series between the base of the input transistor 1 and the load.

Резистором 8 устанавливается мак-, симально допустимый ток нагрузки. Резистором 4 устанавливается необходимый ток базы входного транзистора 1. 5Resistor 8 sets the maximum, the maximum allowable load current. Resistor 4 sets the required base current of the input transistor 1. 5

В режиме нормальной работы, пока сопротивление нагрузки больше порогового, транзисторы 1 и 2 находятся в зоне насыщения. Диоды 6 и 7 закрыты,, так как напряжение между базой тран- 10 зистора 1 и коллектором транзистора 2 меньше порогового напряжения диодов 6 и 7.In normal operation, while the load resistance is greater than the threshold, transistors 1 and 2 are in the saturation zone. Diodes 6 and 7 are closed, since the voltage between the base of transistor 1 and the collector of transistor 2 is less than the threshold voltage of diodes 6 and 7.

В режиме перегрузки, когда сопротивление нагрузки становится меньше порогового, напряжение на нагрузке начинает уменьшаться, а на коллектор но-эмиттерном переходе транзистора 2 - увеличивается. Это приводит к открытию диодов б и 7, уменьшению tqkob базы и коллектора транзистора 1, а следовательно, тока : транзистора 2 и нагрузки. Происходит лавинообразный процесс закрытия транзисторов 1 и 2, а также ста-* билитрона ί. В результате ток потребления от источника уменьшается скачком. Для возвращения стабилизатора в рабочее состояние необходимо отключить нагрузку, .устранить перегрузку и вновь подключить нагрузку. (In overload mode, when the load resistance becomes less than the threshold, the voltage at the load begins to decrease, and at the collector of the no-emitter junction of transistor 2 it increases. This leads to the opening of diodes b and 7, a decrease in tqkob base and collector of transistor 1, and therefore, current: transistor 2 and load. There is an avalanche-like process of closing transistors 1 and 2, as well as stabilitron *. As a result, the current consumption from the source decreases abruptly. To return the stabilizer to working condition, it is necessary to disconnect the load, remove the overload and reconnect the load. (

Claims

The invention relates to electrical engineering and can be used to power electrical and medical equipment, in particular, in a device for finding the active biological points of a person. A DC voltage regulator is known, which contains a regulating element, a supporting element, a bias resistor, a protection node fl. However, the known stabilizer does not have a wide range of variation of the load current in the area of microampere currents and there is no stepwise decrease in the current consumption during an overload. Also known is a DC voltage regulator, containing a regulating element on two transistors of different conductivity types, connected between the input and output pins of the stabilizer, a supporting element on the zener diode connected by one output to the common output of the stabilizer, a bias resistor of the regulating element connected by one circuit To the common output of the stabilizer, the threshold element on a silicon diode is connected by one output to the output stabilizer 2. The disadvantage of the stabilizer is the absence of a step a very low current consumption in case of overload. The purpose of the invention is to provide a stepwise decrease in current consumption during an overload. The goal is achieved by the fact that in the stabilizer the transistors of the regulating element are connected in series, the emitters are connected, the base of the input transistor is connected to other terminals of the bias resistor and the threshold-element, and the base of the output transistor is connected to another terminal of the reference element. The drawing shows a circuit diagram of a voltage stabilizer. The stabilizer contains regulating transistors 1 and 2 of pnp and pnp type, connected in series with the combined emitters connected between the power source and the load, the reference zener diode 3, the bias resistor 4 of the input regulating transistor 1, the threshold element 5 on silicon diodes b and 7, connected in series between the base of the input transistor 1 and the load. Resistor 8 sets the maximum allowable load current. Resistor 4 sets the required base current of the input transistor 1. In normal operation, while the load resistance is greater than the threshold, transistors 1 and 2 are in the saturation zone. Diodes 6 and 7 are closed as the voltage between the base of transistor 1 and the collector of transistor 2 is less than the threshold voltage of diodes 6 and 7. In the overload mode, when the load resistance becomes less noporoBoi o, the voltage on the load begins to decrease, and the collector the emitter junction of transistor 2 increases. This leads to the discovery of diodes b and 7, a decrease in the TQKOB of the base and collector of the transistor 1, and therefore of the current g of the transistor 2 and the load. There is an avalanche-like process of closing transistors 1 and 2, as well as Zener diode 3. As a result, the current consumption from the source is reduced by the jump. To return the stabilizer to working condition, it is necessary to disconnect the load, remove the overload and reconnect the load. .one-. Claims An DC voltage regulator containing a regulating element on two transistors of different types of conductivity, connected between the input and output terminals of the stabilizer, a supporting element on the zener diode connected by one output to the common output of the stabilizer, a bias resistor of the regulating element connected by one output to the input terminal of the stabilizer, the threshold element on the silicon diode, connected by one output to the output terminal of the stabilizer, which is Cheney hopping reduce current consumption in case of overload, transistors regulating member | connected in series, their combined emitter, wherein the input transistor 6ei3a soedasnena to other ends of the bias resistor and a threshold element, and the output transistor base connected to the other terminal support element. Sources of information taken into account in the examination 1.Patent of Germany 1.463.703, cl. H 02 H 7/20, 1973.

2. The author's certificate of the USSR 532855, kl.S 05 F 1/58, 1976.