SU1322425A1

SU1322425A1 - Bridge multivibrator

Info

Publication number: SU1322425A1
Application number: SU853890882A
Authority: SU
Inventors: Михаил Иосифович Богданович; Василий Владимирович Павловец; Александр Валентинович Поляков
Original assignee: Белорусский Политехнический Институт
Priority date: 1985-04-26
Filing date: 1985-04-26
Publication date: 1987-07-07

Abstract

Изобретение относитс к импульсной технике и может быть использовано в различных устройствах автоматики, телемеханики и вычислительной техники. Цель изобретени - повышение надежности, КПД и упрощение регулировки частоты следовани импульсов достигаетс за счет предложенного схемного решени , обеспечивающего сокращение числа схемных элементов по сравнению с прототипом, удержание транзисторов , расположенных по диагонали моста , в открытом состо нии одним и тем же током и изменени периода колебаний изменением значени одного из элементов RC-цепи. Мультивибратор выполнен на транзисторах 1-5 обратной проводимости, транзисторах 6-9 пр мой проводимости и содержит резисторы 10-16, конденсатор 17, нагрузку 18, вход 19 начального запуска, выходы 20 и 21. Питание осуществл етс от шины 22. 1 3. п. ф-лы. 1 ил. сл CAD ts:) lN5 4;: го слThe invention relates to a pulse technique and can be used in various automation devices, telemechanics and computer technology. The purpose of the invention is to increase reliability, efficiency and simplify adjustment of the pulse frequency is achieved by the proposed circuit design, which reduces the number of circuit elements compared to the prototype, keeps the transistors located along the bridge diagonal in the open state with the same current and changes the period oscillations by changing the value of one of the RC circuit elements. The multivibrator is made of reverse conduction transistors 1-5, direct conduction transistors 6-9 and contains resistors 10-16, capacitor 17, load 18, initial start input 19, outputs 20 and 21. Power is supplied from bus 22. 1 3. apt. 1 il. sl CAD ts :) lN5 4 ;: go sl

Description

Изобретение относитс к импульсной тех-протекающего по цепи: шина 22 питани ,The invention relates to a pulsed tech-flowing circuit: power bus 22,

нике и может быть использовано в раз- открытые транзисторы 8 и 3, резистор 14, личных устройствах автоматики, телемеха- конденсатор 17, открытые транзисторы 7 и 2, НИКИ и вычислительной техники.обща шина, который удерживает транзисЦелью изобретени вл етс повышение торы 8, 3, 7 и 2 в насыщенном состо - надежности, КПД и упрощение регулировкинии после окончани запускающего импульсаNickname and can be used in open transistors 8 and 3, resistor 14, personal automation devices, telemech capacitor 17, open transistors 7 and 2, NICKY and computer technology. A common bus that holds a transistor. The purpose of the invention is to enhance the tori 8, 3, 7 and 2 in a saturated state - reliability, efficiency and simplification of adjustment after the end of the triggering pulse

и закрывани транзистора 5. Мультивибратор устанавливаетс в положение, при котором на выходе 20 присутствует высокий потенциал, а на выходе 21 - низкий по- 10 тенциал.and closing the transistor 5. The multivibrator is set to a position in which a high potential is present at the output 20, and a low potential at the output 21.

По мере зар да конденсатора 17 уменьшаетс ток зар да и транзисторы 3 и 7 переход т в активный режим работы, что приводит к лавинообразному включению .с транзисторов 8 и 3, а также 7 и 2, после чего начинаетс разр д конденсатора 17 по цепи: лева (по схеме) обкладка конденсатора 17, резистор 14, переход эмиттер - база транзистора 6, нагрузка 18, переход база - эмиттер транзистора 4, втора обдь1 20 и 21, питание осу1лествл етс от 20 кладка конденсатора 17. Это приводит к шины 22 питани . Эмиттеры транзисторов 8 открыванию транзисторов 4 и 6, токи и 9 соединены с шиной 22 питани . Эмит-коллекторов которых открывают транзисторыAs the capacitor 17 charges, the charge current decreases and the transistors 3 and 7 go into active mode, which leads to an avalanche-like switching on with transistors 8 and 3, as well as 7 and 2, after which the discharge of the capacitor 17 in the circuit begins: left (according to the diagram) capacitor plate 17, resistor 14, junction emitter - base of transistor 6, load 18, junction base - emitter of transistor 4, second side 1 20 and 21, power supply is removed from 20 laying capacitor 17. This leads to power bus 22 . The emitters of the transistors 8 are opened by the transistors 4 and 6, the currents and 9 are connected to the power bus 22. Emitters that open transistors

теры транзисторов 1 и 2 соединены с общей 9 и 1, и возникает лавинообразный про- шиной. Между базами и эмиттерами тран- Цесс открывани и насыщени транзисто- зисторов 1, 2, 8 и 9 включены соответствен- ,. ров 9 и 4, 6 и 1, привод щий к пе- но резисторы 10-13. Коллекторы транзис-реключению мультивибратора в состо ние,The terms of the transistors 1 and 2 are connected to a common 9 and 1, and an avalanche-like tire appears. Between the bases and emitters of the trans-cess opening and saturation of the transistors 1, 2, 8 and 9 are included, respectively. Ditch 9 and 4, 6 and 1, resulting in foam resistors 10–13. Transit-switching collectors of the multivibrator to the state

при котором транзисторы 1, 6, 4, 9 откры- 3, 2, 7 закрыты. Конденсачастоты следовани импульсов за счет использовани меньщего количества элементов, удержани транзисторов, расположенных по диагонали моста в открытом состо нии одним и тем же током и изменени периода колебаний изменением значени одного из элементов RC-цепи.wherein the transistors 1, 6, 4, 9 open, 3, 2, 7 are closed. Condensing frequency of the pulse following the use of a smaller number of elements, keeping the transistors located along the diagonal of the bridge in the open state with the same current and changing the oscillation period by changing the value of one of the RC circuit elements.

На чертеже приведена принципиальна электрическа схема мостового мультивибратора .The drawing shows a circuit diagram of a bridge multivibrator.

Мостовой мультивибратор содержит транзисторы 1-5 обратной проводимости, транзисторы 6-9 пр мой проводимости, резисторы 19-16, конденсатор 17, нагрузку 18, вход 19 начального запуска, выхоторов 1, 8 и 2, 9 соединены между собой попарно. Базы и коллекторы транзисторов 3, 4, 6 и 7 подключены соответственно к коллекторам и базам транзисторов 8, 9, 1 и 2. Эмиттеры транзисторов 3 и 6, 4 и 7 сое- 30 динены между собой и подключены к разным выводам последовательной цепочки из резистора 14 и конденсатора 17. База транзистора 8 через резистор 15 подключена к коллектору транзистора 5, эмиттер кототы , аThe bridge multivibrator contains transistors 1-5 of reverse conduction, transistors 6-9 of direct conduction, resistors 19-16, capacitor 17, load 18, initial start input 19, connectors 1, 8 and 2, 9 are interconnected in pairs. The bases and collectors of transistors 3, 4, 6 and 7 are connected to collectors and bases of transistors 8, 9, 1 and 2, respectively. The emitters of transistors 3 and 6, 4 and 7 are 30 connected to each other and connected to different terminals of the series circuit from a resistor 14 and the capacitor 17. The base of the transistor 8 through the resistor 15 is connected to the collector of the transistor 5, the emitter of the cotto, and

тор 17 перезар жаетс через открытые транзисторы 4, 9, 6, 1 и резистор 14. На выходе 20 имеетс низкий потенциал, а на выходе 21 - высокий потенциал.The torus 17 is recharged through the open transistors 4, 9, 6, 1 and the resistor 14. At the output 20 there is a low potential, and at the output 21 a high potential.

После зар да конденсатора 17 транзисторы 4, 9 и 1, 6 закрываютс , а транзисторы 7, 2 и 8, 3 вновь открываютс , процесс переключени аналогичен описанка соединени коллекторов транзисторов 1 и S вл етс выходом 20 устройства, аAfter charging the capacitor 17, the transistors 4, 9 and 1, 6 are closed, and the transistors 7, 2 and 8, 3 are reopened, the switching process is similar to the described connection of collectors of transistors 1 and S is the output 20 of the device, and

рого соединен с базой транзистора 2, а ба- 35 за подключена к входу 19 и через ре- дальнейшем процессы переключени is connected to the base of transistor 2, and 35 is connected to input 19 and later on through switching processes

зистор 16 соединена с общей шиной. Точ- транзисторов периодически повтор ютс . Период переключени определ етс посто нной времени цепи, состо щей из резистора 14The resistor 16 is connected to a common bus. The transistors are periodically repeated. The switching period is determined by the time constant of the circuit consisting of the resistor 14

Claims

point of connection of collectors of transistors. „capacitor /. 2 and 9 is an outlet 21 of the device. The formula of the invention

Load 18 is connected between outputs 20 and 21.1. A bridge multivibrator containing a bridge multivibrator operates with two arms, each of which is adjacent. From the first transistor, reverse voltage is applied. The d3 supply voltage, the base of which is connected through transistors 1-9, is closed and the current through the first resistor with emitter and common bus is turned on,

load 18 does not arrive.

If a triggering pulse of positive polarity is applied to input 19 (for example, "Initial reset"), transistor 5 opens, causing a current to flow through the circuit: power supply 22, junction emitter - base of transistor 8, resistor 15, collector - emitter open transistor 5 and the base-to-emitter junction of transistor 2. As a result of this trans- each shoulder, the base and collector of the third zistor 8 and 2 open and the current of their direct conductive transistor connects its collector to the output of the shoulder and forward conduction, the base of which is connected via a second resistor to the emitter 50 and Shih hydrochloric power between the output terminals shoulders included for connecting a load, characterized in that, with a view to the Enhance reliability, efficiency, and simplify adjustment of the pulse repetition frequency, in

The emitter of the third transistor is connected to the emitter of the fourth transistor of the two collectors, respectively, by the transistors 3 and 7, which leads to a charge current of the capacitor 17,

wherein the transistors 1, 6, 4, 9 open, 3, 2, 7 are closed. Condensates as well

The torus 17 is recharged through the open transistors 4, 9, 6, 1 and the resistor 14. At the output 20 there is a low potential, and at the output 21 a high potential.

After charging the capacitor 17, the transistors 4, 9 and 1, 6 are closed, and the transistors 7, 2 and 8, 3 are reopened, the switching process is similar to that described by each arm of the base and collector of the third direct transistor connected to the collector and the collector The second direct-transistor transistor, the base of which through the second resistor is connected to the emitter and bus power, connects terminals between the arms to connect the load, characterized in that, in order to increase the reliability of operation, efficiency and ease The frequency of the pulse, in

The emitter of the third transistor is connected to the emitter of the fourth reverse-transistor transistor, the base and collector of which is connected to the collector and the base of the second transistor, the emitters of the third transistor of the first and second shoulders are connected via a series-connected resistor and a capacitor.

2. Multivibrator according to claim I, characterized in that, in order to increase reliability

after starting the power supply, the base of the second transistor of the first shoulder is connected via the fourth resistor to the collector of the fifth reverse transistor transistor, the emitter of which is connected to the base of the first transistor of the second shoulder, the base of the fifth transistor is connected to the start input and through the fifth resistor is connected to the common bus .