SU515284A1

SU515284A1 - Switch

Info

Publication number: SU515284A1
Application number: SU2097673A
Authority: SU
Inventors: Эдуард Михайлович Войтянов; Борис Георгиевич Гаврилов; Игорь Григорьевич Никитюк; Александр Николаевич Тыныныка
Original assignee: Одесский ордена Трудового Красного Знамени политехнический институт
Priority date: 1975-01-10
Filing date: 1975-01-10
Publication date: 1976-05-25

Description

1one

Изобретение может использоватьс в радиотехнических устройствах различного назначени , в частности в аппаратуре радиовешани и телевидени .The invention can be used in radio engineering devices for various purposes, in particular in radio hanging equipment and television.

Известны комк1утаторы, содержащие дифференциальный усилитель, состо щий из двух транзисторов, к общей точке соединени эмиттеров которых подключен коллектор третьего транзистора, база которого соединена через резистор и диод с щивой пита- ни и через резистор - с коллектором четвертого транзистора, база которого через резисторный делитель соединена с щиной уп равл юших сигналов, .три коммутируемых транзистора и диоды.Commutators containing a differential amplifier consisting of two transistors are known, to the common point of emitters of which the collector of the third transistor is connected, the base of which is connected via a resistor and diode to the power supply and the collector of the fourth transistor, the base of which is through a resistor divider It is connected to the power of control signals, three switched transistors and diodes.

Цель изобретени - повыщение стабильности работы коммутатора.The purpose of the invention is to increase the stability of the switch.

Цель достигаетс тем, что коллекторы транзисторов дифференциального усилител соединены с шиной питани через после- довате ьно сос.дкнеиные диод и резистор, общие точки диода и резистора подключены соответственно к базам первого и второго коммутируемых транзисторов, эмиттеры которых через резисторы подключены к шине The goal is achieved by the fact that the collectors of transistors of the differential amplifier are connected to the power bus through a series diode diode and resistor, the common points of the diode and resistor are connected respectively to the bases of the first and second switched transistors, whose emitters are connected to the bus through resistors

питани , коллектор первого коммутируемого транзистора соединен с базой третьего коммутируемого транзистора противоположного типа-проводимости, коллектор которого соединен с коллектором второго коммутируемого транзистора и с щиной выходных сигналов .power supply, the collector of the first switched transistor is connected to the base of the third switched transistor of the opposite type-conduction type, the collector of which is connected to the collector of the second switched transistor and the output signals.

На чертеже представлена принципиальна схема коммутатора.The drawing shows a schematic diagram of the switch.

Claims

The kummutator contains a differential cascade consisting of the first and second switched elements on transistors 1 and 2, to the point of connection of which emitters are connected a collector, a transistor 3 of a stable current generator controlled by a divider on resistors 4 and 5 and a diode 6 from the key transistor 7 on the base of which through a resistive divider 8 and 9 is supplied with a switching signal from terminal 1O. The collectors of transistors 1, 2 of the first and second switched elements are connected to the power supply bus — E via diodes 11 and 12 and resistors 13 and 14, and the connection points of diodes II and 12 and resistors 13, 14 are connected to the bases of the third and fourth switched elements on transistors 15 and 1c. The mode of the fourth switched element is set by resistors 17 and .1 8 in the circuits of its emitter and collector, and the collector base of the fifth com- mandated element on transistor 19 is connected to the collector 16, and its collector is connected to the collector of transistor 15 of the third switched element with the output 20 of the base Tpai; oKCTop, j 2 of the second switching element and the resistor 21. When a switching signal of positive polarity, for example, from an integral trigger, arrives at terminal 1O, the transistor 7 opens 3, a stable current generator establishes the potential at which the current of the amplifier mode of the differential stage flows through the transistor. A potential is established on the collector of transistors 1, 2 of the differential cascade, which ensures the linear operation of the third and fourth switched elements on the ground 1 pins 15 and 16. To symmetrically both arms of the differential cascade in the collector circuit of transistors 1, 2 and the second switched elements Diodes 11 and 12 are introduced, which also reduce cross-sectional distortion during switching. The fourth switching element on the transistor 16 serves as an inverter signal, which enters a switching element on a transistor 19 on Tbiii 19. Thus, the signals on the push-pull output stage formed by the third and fifth switching elements are phased, and their amplitude uniqueness is achieved by introducing an emitter circuit and the collector of the transistor 16 is the fourth commuted element of the same resistors 17 and 18, which determine the transfer coefficient of the fourth switched element to unity. A potential is established on the collector of the transistor 16 of the fourth switched element, ensuring the linear operation of the fifth switching element per line} HS 1 Store 19. The identical care modes of the third and fifth DC elements 15 through one DC current flow through them in the same manner. opposite t. ki from sources of opposite p-HOCTeii-B, and + E sources, so they are compensated at the load resistor 21, and zero output is provided for the output. When a switching signal of zero or negative polarity arrives at terminal 10, the key transistor 7 closes, causing the transistor 3 to close and the power supply circuit to be disconnected | In this case, the first and second KO; -IyIfye. The elements are also fixed on the collectors of transistors 1 and 2 at no5iBj: MeTCH potential, equal in polarity and amplitude to the voltage of the power supply source -E. This potential closes the third and fourth.; Y,: irp},) - a positive potential equal to the amplitude of the voltage of the power source + Е, closing the fifth switched element, appears on the cells and on the collector of the transistor 16 of the fourth switched element. Thus, in the closed state, the third and fifth switched elements are closed and no current flows through them, i.e., at the output 20 of the switch, the potential is zero. The invention of the switch, containing a differential amplifier consisting of two transistors, to the common connection point of the terminals 1) of which is connected the collector of the third T) anistor, the base of which is connected through a resistor and the diode with the power supply and the collector of the fourth Tfian resistor the base of which is connected through a resistor divider to a control signal terminal, three switched T) anzistors and diodes, with the fact that, in order to increase the stability of operation, the transistor collectors O1) Ov differential the amplifier is connected to the power supply through a series-connected diode and resistor, common points of the diode and resistor) and are connected respectively to the bases of the first and second switched transistors, the emitters of which are connected via resistors to the pin of the main capacitor, the collector of the first KOMtviyTupyeMoro t) a) 1 res | -) and is connected to the base of the third switched traizist.) - pa of the opposite conductivity type, the collector of which is connected to the collector; ca (the second switched transistor 1a and with the output signals.