SU765987A1

SU765987A1 - Two-cycle relaxator

Info

Publication number: SU765987A1
Application number: SU782669149A
Authority: SU
Inventors: Александр Михайлович Богомолов; Анатолий Николаевич Манойленко
Original assignee: За витель 54) ДВУХТАКТНЫЙ РЕЛАКСАТОР ,.„765987
Priority date: 1978-10-22
Filing date: 1978-10-22
Publication date: 1980-09-23

Description

Изобретение относится к импульсной технике и может быть использовано в устройствах управления с широтно-импульсным регулированием.The invention relates to a pulse technique and can be used in control devices with pulse-width regulation.

Известны мультивибраторы с разрядным триггером, содержащие времязадающую резистивно-емкостную цепочку и пороговый триггер по схеме с эмиттерной обратной связью, подключенный входной цепью параллельно времязадающему кон- Ю денсатору £1^. Эти мультивибраторы являются, по существу, релаксаторами однотактного действия.Multivibrators with a discharge trigger are known, containing a time-supplying resistive-capacitive circuit and a threshold trigger according to a circuit with emitter feedback, connected by an input circuit parallel to the time-setting capacitor £ 1 ^. These multivibrators are essentially single-acting relaxers.

Известны также двухтактные релаксаторы, содержащие две резистивно-ем- 15 костных цепочки и разрядный пороговый триггер с эмиттерной обратной связью, который имеет два входа [2] .Push-pull relaxers are also known, containing two resistive-capacitive 15 bone chains and a discharge threshold trigger with emitter feedback, which has two inputs [2].

Известные генераторы имеют недостаточный диапазон регулирования скваж- 20 ности выходных импульсов.Known generators have an insufficient range of regulation of the duty cycle of the output pulses.

Известен многокаскадный мультивибратор, содержащий две резистивно-емкостных цепочки, два разрядных пороговых элемента, охваченных цепью положи-25 тельной обратной связи и образующих двухходовой разрядный пороговый триггер [3] . В принципе, в этом многокаскадном мультивибраторе может быть предусмотрена регулировка скважности об- 30 щеизвестным способом путем подключения резистивных зарядных цепей к парафазной цепи управляющего сигнала.Known multi-stage multivibrator containing two resistive-capacitive chains, two discharge threshold elements, covered by a positive feedback circuit and forming a two-way discharge threshold trigger [3]. In principle, in this multi-stage multivibrator, duty cycle adjustment can be provided in a well-known manner by connecting resistive charging circuits to the paraphase circuit of the control signal.

Однако двухтактный релаксатор с та5 кой схемой регулировки скважности не может обеспечить устойчивой генерации в широком диапазоне скважностей сигнала.However, a push-pull relaxer with such a duty cycle adjustment circuit cannot provide stable generation in a wide range of signal duty cycle.

Целью изобретения является обеспечение широкого диапазона регулируемой скважности выходных импульсов.The aim of the invention is to provide a wide range of adjustable duty cycle output pulses.

Для достижения этого в двухтактном⁰релаксаторе, содержащем две времяэадающие резистивно-емкостные цепи, два разрядных пороговых элемента, охваченных перекрестными цепями положительной обратной связи, образующих двухвходовый разрядный пороговый триггер, присоединенный входами к времязадающим резистивно-емкостным цепям, каждое плечо разрядного триггера выполнено на четырех транзисторах, при этом в левом плече триггера первый · транзистор имеет проводимость р-п-р, его база соединена с ’конденсатором времяэадакадей RC-цепи, резистор которого соединен с шиной питания, второй транзистор имеет проводимость р-п-р, его база и эмиттер подключены параллельно к базе и эмиттеру первого тран зистора, эмиттеры упомянутых транзисторов соединены с эмиттером третьего транзистора, который имеет проводимость п-р-п, коллектор третьего транзистора соединен с общей шиной, причем коллектор первого транзистора соединен с эмиттером четвертого транзи.с.т тора, который имеет проводимость р-п-р, а его коллектор соединен с шиной питания, база подключена к коллектору второго транзистора и через резистор к шине питания, в правом плече триггера первый транзистор имеет проводимость п-р-п,его база соединена с конденсатором времязадающей RC-цепи, резистор которой соединен с общей шиной, второй транзистор имеет проводимость п-р-п,его база и эмиттер подключены параллельно к базе и эмиттеру первого транзистора, эмиттеры упомянутых транзисторов данного плеча триггера соединены с эмиттером третьего транзистора, который имеет проводимость рn-ρ.коллектор третьего транзистора соединен с шиной питания, причем коллектор первого транзистора данного плеча соединен с эмиттером четвертого транзистора, который имеет проводимость п-р-п, а его коллектор соединен с общей шиной, база:,:подключена к коллектору второго транзистора и через резистор - к общей шине, при этом коллектор первого транзистора ле+ вого плеча триггера соединен с базой третьего транзистора правого плеча : триггера и первым выходом устройства, а коллектор первого транзистора правого плеча Триггера соединен с базой третьего транзистора левого плеча триггера и с вторым выходом устройства, эмиттер первого транзистора левого плеча триггера соединен через два последовательно включенных в прямом направлении диода с эмиттером первого транзистора правого плеча триггера, средняя точка соединения диодов подключена к средней точке резисторного делителя, один вывод которого соединен с эмиттером одного дополнительного транзистора с проводимостью рп-р,коллектор которого подключен к шине питания,а другой вывод резисторного делителя подключен к эмиттеру 'другого дополнительного транзистора с проводимостью η-ρ-n, коллектор которого соединен с общей шиной, причем базы упомянутых дополнительных транзисторов подключены к источнику регулируемого напряжения.To achieve this, in a push-pull ⁰ relaxer containing two time-conducting resistive-capacitive circuits, two bit threshold elements, covered by cross positive feedback circuits, forming a two-input bit threshold trigger, connected by inputs to a time-resistive capacitive circuit, each shoulder of the discharge trigger is made transistors, while in the left shoulder of the trigger the first · transistor has a conductivity rpn, its base is connected to an RC-circuit time capacitor, the resistor is It is connected to the power bus, the second transistor has r-p-p conductivity, its base and emitter are connected in parallel to the base and emitter of the first transistor, the emitters of the above transistors are connected to the emitter of the third transistor, which has p-r-p conductivity, the collector of the third the transistor is connected to a common bus, and the collector of the first transistor is connected to the emitter of the fourth transistor of the torus, which has conductivity rpn, and its collector is connected to the power bus, the base is connected to the collector of the second transistor the resistor to the power bus, in the right shoulder of the trigger, the first transistor has conductivity rpn, its base is connected to a capacitor of a timing RC circuit, the resistor of which is connected to a common bus, the second transistor has conductivity rpp, its base and emitter connected in parallel to the base and emitter of the first transistor, the emitters of the mentioned transistors of this trigger arm are connected to the emitter of the third transistor, which has a pn-ρ conductivity. the collector of the third transistor is connected to the power bus, and the collector of the first transistor is of the other arm is connected to the emitter of the fourth transistor, which has a conductivity of rpn, and its collector is connected to a common bus, base:,: is connected to the collector of the second transistor and through a resistor to the common bus, while the collector of the first transistor is left + of the trigger arm is connected to the base of the third transistor of the right shoulder: the trigger and the first output of the device, and the collector of the first transistor of the right shoulder of the trigger is connected to the base of the third transistor of the left shoulder of the trigger and to the second output of the device, the emitter of the first transistor the left shoulder of the trigger is connected through two diodes connected in series in the forward direction to the emitter of the first transistor of the right shoulder of the trigger, the midpoint of the diode connection is connected to the midpoint of the resistor divider, one terminal of which is connected to the emitter of one additional transistor with conductivity rp-p, the collector of which is connected to the power supply bus, and the other output of the resistor divider is connected to the emitter of another additional transistor with conductivity η-ρ-n, the collector of which is connected to a common bus, when than the bases of the mentioned additional transistors are connected to a regulated voltage source.

На чертеже приведена принципиальная схема двухтактного релаксатора.The drawing shows a schematic diagram of a push-pull relaxer.

Предлагаемый двухтактный релаксатор содержит две разистивно-емкостные времязадающие цепочки, разрядный пороговый триггер и управляющую схему.The proposed push-pull relaxer contains two capacitive time-varying chains, a discharge threshold trigger and a control circuit.

Резистор 1 и конденсатор 2 составляют времязадающую цепочку левой поло·* вины схемы. Резистор 3 и конденсатор 65 составляют времязадающую цепочку правой половины схемы.Resistor 1 and capacitor 2 make up the timing chain of the left half of the circuit fault. Resistor 3 and capacitor 65 constitute a time-chain of the right half of the circuit.

Транзисторы 5,6,7 и резистор 8 образуют трехтранэисторный ключ левого разрядного порогового элемента А, а транзистор 9 (эмиттерный повторитель) является управляющим элементом положительной обратной связи из правого разрядного порогового элемента Б в левый разрядный пороговый элемент А.The transistors 5,6,7 and resistor 8 form a three-transistor switch of the left bit threshold element A, and the transistor 9 (emitter follower) is the positive feedback control element from the right bit threshold element B to the left bit threshold element A.

Аналогично,транзисторы 10,11,12 и резистор 13 образуют трехтранзисторный ключ правого разрядного порогового элемента Б, а транзистор 14 (эмиттерный повторитель) является управляющим элементом положительной обратной связи из левого разрядного порогового элемента А в правый разрядный пороговый элемент Б.Similarly, transistors 10,11,12 and resistor 13 form a three-transistor switch of the right bit threshold element B, and the transistor 14 (emitter follower) is a positive feedback control element from the left bit threshold element A to the right bit threshold element B.

В рассмотренных трехтранэисторных ключах транзисторы 6 и 10 - основные, и 11 - вспомогательные управляющие транзисторы, 7 и 12 - вспомогательные транзисторы управляемой коллекторной нагрузки.In the considered three-transistor switches, transistors 6 and 10 are the main ones, and 11 are auxiliary control transistors, 7 and 12 are auxiliary transistors of a controlled collector load.

Диоды 15 и 16 задают установку разрядных пороговых элементов А и Б, соответственно. Транзисторы 17 и 18 с ограничительными резисторами 19 и 20 образуют двухсторонний эмиттерный повторитель, развязывающий цепь источника управляющего сигнала 21. Шины 22 и 23 являются выходными. Сигналы этих ’ шин синфазны. Коллекторное питание подается на шину 24.Diodes 15 and 16 specify the installation of the discharge threshold elements A and B, respectively. Transistors 17 and 18 with limit resistors 19 and 20 form a two-sided emitter follower, decoupling the source circuit of the control signal 21. Bus 22 and 23 are output. The signals of these ’buses are in phase. Collector power is supplied to bus 24.

Исходное состояние соответствует моменту подключения источника питания к шине 24. При этом левая А или правая Б половина разрядного порогового триггера оказывается во включенном состоянии. Допустим, в исходном состоянии включена правая половина Б триггера. Этому состоянию соответствует открытое состояние транзисторовThe initial state corresponds to the moment the power source is connected to bus 24. In this case, left A or right B half of the bit threshold trigger is in the on state. Suppose, in the initial state, the right half of trigger B is turned on. This state corresponds to the open state of the transistors.

7,14,11,10 и запертое состояние транзисторов 12,9,5,6. Конденсатор 4 поддерживается в разряженном состоянии через базово-эмиттерную цепь транзисторов 10,11 и коллекторно-эмиттерную цепь транзистора 14. Конденсатор 2 заряжается через резистор 1 и изменяет потенциал баз транзисторов 5 и 67,14,11,10 and the locked state of the transistors is 12,9,5,6. Capacitor 4 is maintained in discharged state through the base-emitter circuit of transistors 10,11 and the collector-emitter circuit of transistor 14. Capacitor 2 is charged through resistor 1 and changes the base potential of transistors 5 and 6

Когда потенциал баз транзисторов 5 и б станет более отрицательным, чем потенциал анодной точки диода 15, произойдет предварительное включение· транзисторов 5 и 6'и запирание эмиттерного повторителя на транзисторе 7 В результате этого эмиттерная цепь транзисторов 10,11 обесточится. При этом эмиттерный повторитель на транзисторе 12 перейдет в открытое состояние и откроет транзистор 9 в эмиттерной цепи транзисторов 5 и б. Благодаря этому отрицательный потенциал эмиттерной точки транзисторов 5 и б уменьшится до потенциала нулевой шины. Это равносильно скачкообразному уменьшению входного сопротивления левой половины триггера. Входное сопротивление разрядного порогового элемента А в фазе его открытого (включенного) состояния крайне незначительно и поэтому конденсатор 2 разряжается очень быстро. После разряда конденсатора 2 левая половина триггера поддерживает- 5 ся в открытом состоянии за счет тока, ограничиваемого резистором 1. В открытом состоянии левой половины триггера потенциал эмиттерной точки транзисторов 10,11 правой половины фиксирован Ю потенциалом катодной точки диода 16, благодаря чему транзисторы 10,11 надежно заперты. Когда же в результате заряда конденсатора 4 через резистор 3 отрицательный потенциал базовой точ· 15 ки транзисторов 10,11 станет ниже отрицательного потенциала катодной точки диода 16, произойдет предварительное включение транзисторов 10,11. При этом эмиттерный повторитель на транзисторе 20 12 переходит в бестоковое состояние и, воздействуя на транзистор 9, запирает транзисторы 5 и 6. Эмиттерный повторитель на транзисторе 7 переходит в токовое состояние и через транзистор 14 25 изменяется потенциал эмиттерной точки транзисторов 10,11 до потенциала шины коллекторного питания 24.Это равносильно скачкообразному уменьшению входного сопротивления разрядного порогового элемента Б правой половины разрядно-30 го порогового триггера.Благодаря незначительности входного сопротивления правой половины разрядного порогового триггера в фазе ее открытого состояния, разряд кспденса- 35 тора 4 происходит весьма быстро. Высокая скорость разряда конденсаторов 2 и 4 в фазах их разряда создает возможность регулирования скважности сигнала в широких пределах. 40When the base potential of transistors 5 and 6 becomes more negative than the potential of the anode point of diode 15, the transistors 5 and 6 are preliminarily switched on and the emitter follower is blocked on transistor 7. As a result, the emitter circuit of transistors 10.11 is de-energized. In this case, the emitter follower on the transistor 12 will go into the open state and open the transistor 9 in the emitter circuit of the transistors 5 and b. Due to this, the negative potential of the emitter point of the transistors 5 and b will decrease to the potential of the zero bus. This is equivalent to a stepwise decrease in the input resistance of the left half of the trigger. The input resistance of the discharge threshold element A in the phase of its open (on) state is extremely small and therefore the capacitor 2 is discharged very quickly. After the discharge of capacitor 2, the left half of the trigger is kept open due to the current limited by the resistor 1. In the open state of the left half of the trigger, the potential of the emitter point of transistors 10.11 of the right half is fixed by the potential of the cathode point of diode 16, so that the transistors 10, 11 securely locked. When, as a result of the charge of the capacitor 4 through the resistor 3, the negative potential of the base point · 15 of the transistors 10.11 becomes lower than the negative potential of the cathode point of the diode 16, the transistors 10.11 will be preliminarily switched on. In this case, the emitter follower on the transistor 20 12 goes into a non-current state and, acting on the transistor 9, locks the transistors 5 and 6. The emitter follower on the transistor 7 goes into the current state and through the transistor 14 25 the potential of the emitter point of the transistors 10.11 changes to the bus potential collector supply 24.This is equivalent to a stepwise decrease in the input resistance of the discharge threshold element B of the right half of the discharge-30th threshold trigger. Due to the insignificance of the input resistance of the rights the second half of the discharge threshold trigger in a phase of its open state, the discharge kspdensa- 35 4 torus is very rapid. The high discharge rate of capacitors 2 and 4 in the phases of their discharge makes it possible to control the signal duty cycle over a wide range. 40

После разряда конденсатора 4 открытое состояние правой половины триггера поддерживается током, который ограничивается резистором 3. Далее процесс переключения повторяется. дсAfter the discharge of the capacitor 4, the open state of the right half of the trigger is maintained by the current, which is limited by the resistor 3. Next, the switching process is repeated. ds

При величине управляющего нарряжения, равном половине напряжения питания, коэффициент заполнения импульса равен 0,5. При увеличении управляющего напряжения выше половины напряже- gg ния питания цикл заряда конденсатора 4 укорачивается, а конденсатора 2 удлиняется.Это приводит к удлинению отрицательной вершины выходного сигнала, т.е. к увеличению коэффициента заполнения. При уменьшении управляющего напряжения ниже половины напряжения питания цикл заряда конденсатора 4 увеличивается, а конденсатора 2 укорачивается. Это приводит к уменьшению длительности отрицательной вер- 60 шины выходного сигнала, т.е. к уменьшению коэффициента заполнения.When the value of the control voltage is equal to half the supply voltage, the pulse duty ratio is 0.5. When the control voltage increases above half the supply voltage gg, the charge cycle of the capacitor 4 is shortened, and the capacitor 2 lengthens. This leads to an extension of the negative peak of the output signal, i.e. to increase fill factor. When the control voltage decreases below half the supply voltage, the charge cycle of the capacitor 4 increases, and the capacitor 2 is shortened. This leads to a decrease in the duration of the negative vertex of the output signal, i.e. to decrease fill factor.

В результате применения рассмотренной, схемы двухвходового разрядного порогового триггера удается получить 65 большой диапазон регу.пирования скважности сигнала, который, практически, соответствует изменению коэффициента заполнения от 0,02 до 0,98.As a result of the application of the considered two-input discharge threshold trigger circuit, it is possible to obtain 65 a wide range of signal duty cycle adjustment, which, in practice, corresponds to a change in duty cycle from 0.02 to 0.98.

Claims

The invention relates to a pulse technique and can be used in pulse-width control devices. Known multivibrators with a discharge trigger contain a time specifying a resistive-capacitive chain and a threshold trigger according to an emitter feedback circuit connected by an input circuit in parallel with the time specifying a capacitor. These multivibrators are essentially one-stroke relaxers. Two-stroke relaxators are also known, which contain two resistive-capacitive chains and a discharge threshold trigger with emitter feedback, which has two inputs 2. The known generators have an insufficient range of regulation of the duty cycle of the output pulses. A multi-stage multivibrator is known, containing two resistive-capacitive chains, two bit threshold elements, covered by a positive feedback circuit and forming a two-way bit threshold trigger. In principle, in this multistage multivibrator, the duty ratio can be foreseen in a well-known way by connecting resistive charging circuits to the paraphase control signal circuit. However, a push-pull relaxator with such a pattern for adjusting the duty ratio cannot provide stable generation in a wide range of signal duty cycles. The aim of the invention is to provide a wide range of adjustable duty cycle of output pulses. To achieve this, in a two-stroke relaxator containing two times the driving resistive-capacitive circuits, two bit threshold elements, covered by positive feedback cross-circuits, forming a two-input bit trigger trigger, connected by inputs to the time of the resistive-capacitive circuits, each the discharge trigger shoulder is made on four transistors, while in the left trigger trigger the first transistor has a p-p conductance, its base is connected to the capacitor, the RC circuit time, the resistor to The second transistor has a pp conductance, its base and emitter are connected in parallel to the base and the emitter of the first transistor, the emitters of these transistors are connected to the emitter of the third transistor, which has a third conductor the transistor is connected to the common bus, and the collector of the first transistor is connected to the emitter of the fourth transistor of the torus, which has a conductance of pp; its collector is connected to the power bus, the base is connected to the collector of the second transistor and black Without a resistor to the power supply bus, in the right shoulder of the trigger, the first transistor has a p-p conductivity, its base is connected to a capacitor, and the back of the RC circuit, the resistor of which is connected to the common bus, the second transistor has a p-p conductivity, its base and the emitter is connected in parallel to the base and the emitter of the first transistor, the emitters of the mentioned transistors of this trigger arm are connected to the emitter of the third transistor, which has conduction pp-p, the collector of the third transistor is connected to the power bus, and the collector of the first transistor The side of this shoulder is connected to the emitter of the fourth transistor, which has a p-p conductivity, and its collector is connected to a common bus, the base is connected to the collector of the second transistor and through a resistor to the common bus, while the collector of the first transistor of the left shoulder the trigger is connected to the base of the third right-hand transistor: the trigger and the first output of the device, and the collector of the first transistor of the right-hand trigger is connected to the third transistor of the left shoulder of the trigger and to the second output of the device, the emitter of the first transistor the torus of the left shoulder of the flip-flop is connected through two diodes in series in the forward direction with the emitter of the first transistor of the right shoulder of the flip-flop, the middle connection point of the diode is connected to the midpoint of the resistor divider, one output of which is connected to the emitter of one additional transistor with conductivity pn p, the collector of which is connected to the power supply bus, and the other output of the resistor divider is connected to the emitter of another additional transistor with the conductivity nrp, whose collector is connected to the common otherwise, the base of said additional transistors are connected to a regulated source voltage. The drawing shows a schematic diagram of a push-pull relaxator. The proposed push-pull relaxator contains two raster-capacitive timing of the driver circuits, a discharge threshold trigger, and a control circuit. Resistor 1 and capacitor 2 are composed of lgat time defining the left half of the fault circuit. The resistor 3 and the capacitor 4 make up the time defining the chain of the right half of the circuit. Transistors 5, 6, 7 and resistor 8 form a three-transistor switch of the left bit threshold element A, and transistor 9 (emitter follower) is a control element of the positive feedback from the right bit threshold element B to the left bit threshold element A. Likewise, transistors 10, 11, 12 and resistor 13 form a three-transistor switch of the right bit threshold element B, and transistor 14 (emitter follower) is a control element of the positive feedback from the left bit threshold element A right cient the discharge threshold element B. In the above .trehtranzistornyh keys transistors 6 and 10 - the main, 5i 11 - vspemogatelnye The control transistors 7 and 12 - auxiliary transistors controlled by the collector load. Diodes 15 and 16 set the installation of bit thresholds A and B, respectively. The transistors 17 and 18 with the limiting resistors 19 and 20 form a double-sided emitter follower, which connects the source of the control signal 21. The buses 22 and 23 are output. The signals of these buses are in phase. The collector power is supplied to the bus 24. The initial state corresponds to the moment when the power source is connected to the bus 24. In this case, the left A or right B half of the threshold threshold trigger is in the on state. For example, in the initial state, half of the right trigger is enabled. This state corresponds to the open state of the transistors 7,14,11,10 and the locked state of the transistors 12,9,5,6. The capacitor 4 is maintained in a discharged state through the base-emitter circuit of the transistors 10,11 and the collector-emitter circuit of the transistor 14. The capacitor 2 is charged through the resistor 1 and changes the potential of the bases of the transistors 5 and 6 when negative than the potential of the anode point of the diode 15, transistors 5 and 6 will be pre-energized and the emitter follower locks on transistor 7. As a result, the emitter circuit of transistors 10.11 will be de-energized. In this case, the emitter follower on the transistor 12 goes into the open state and opens the transistor 9 in the emitter circuit of transistors 5 and 6. Due to this, the negative potential of the emitter point of transistors 5 and b decreases to the potential of the zero bus. This is equivalent to a stepwise decrease in the input impedance of the left HALF trigger. The input resistance of the discharge threshold element A in the phase of its open (on) state is extremely small and, therefore, capacitor 2 is discharged very quickly. After the capacitor 2 is discharged, the left half of the flip-flop is kept in the open state due to the current limited by the resistor 1. In the open state of the left half of the flip-flop, the emitter point potential of the transistors 10.11 of the right half is fixed by the potential of the cathode point of the diode 16, so that the transistors 10, 11 securely locked. When, as a result of charging the capacitor 4 through the resistor 3, the negative potential of the base point of the transistors 10,11 becomes lower than the negative potential of the cathode point of diode 16, the transistors 10,11 will be switched on in advance. When this emitter follower on the transistor 12 goes into a non-current state and acts on the transistor 9, locks the transistors 5 and 6. The emitter repeater on the transistor 7 goes into the current state and through the transistor 14 changes the potential of the emitter point of transistors 10.11 to potential collector power bus 24.This is equivalent to a stepwise decrease in the inlet resistance of the discharge threshold of element B of the right half of the discharge of the threshold threshold. Thanks to the insignificance of the input resistance of the floor The bits of the discharge threshold trigger in the phase of its open state, the discharge of the sensor x 4 occurs very quickly. The high discharge rate of capacitors 2 and 4 in the phases of their discharge makes it possible to control the signal's duty cycle over a wide range. After the capacitor 4 is discharged, the open state of the right half of the flip-flop is maintained by a current which is limited by the resistor 3. Then the switching process is repeated. When the control voltage is equal to half the supply voltage, the pulse filling factor is 0.5. By increasing the control voltage above half the supply voltage, the charge cycle of the capacitor 4 is shortened and the capacitor 2 lengthens. This leads to an elongation of the negative peak of the output signal, i.e. to increase the fill factor. When the control voltage drops below half the supply voltage, the cycle r & a of capacitor 4 increases and the capacitor 2 shortens. This leads to a decrease in the duration of the negative vertex of the output signal, i.e. to a decrease in the fill factor. As a result of the application of the considered, two-input bit threshold trigger circuit, it is possible to obtain a large range. the duty cycle of the signal, which, in practice, corresponds to its own coefficient of filling from 0.02 to 0.98. Claims of the invention Push-pull relaxator containing. two time set resist; E-capacitance circuits, two bits of threshold elements, covered by intersection circuits of positively} feedback, forming a two-input bit threshold trigger connected by inputs to the time of the resistive-capacitive circuits, characterized by the fact that the range of the adjustable duty cycle of the output pulses, each shoulder of the discharge trigger is made of four transistors, while the first transistor in the left shoulder of the trigger has a pnp conductivity, its base is connected to the capacitor, I set the time An RC circuit with a resistor connected to the power bus is connected to it, the second transistor has a p-p conductivity, its base and emitter are connected in parallel to the base and emitter of the first transistor r and the emitters of the third transistor, which has the conductivity of the pp, the collector of the third transistor is connected to the common bus, the collector of the first transistor is connected to the emitter of the fourth transistor, which has a conductivity of pnp, and its collector is connected to the other supply, the base is connected to the collector of the second transistor and through a resistor to the power supply bus, in the right shoulder of the trigger, the first transistor has a p-p conductance, its base is connected to the capacitor time of the receiving RC circuit, the resistor of which is connected to the main bus, the second transistor has a p-p-conductance p, its base and emitter are connected in parallel to the base and the emitter of the first transistor; the collector of the first transistor, which has conductivity, pnp, and its collector is connected to the common bus, the base is connected to the collector of the second transistor and through a resistor to the common bus, while the collector of the first transistor of the left shoulder of the trigger is connected trigger and with the first output of the device, and the collector of the first transistor of the right shoulder of the trigger is connected to the base of the third transistor of the left shoulder of the trigger and the second output of the device, the emitter of the first transistor of the left shoulder of the trigger One through two diodes connected in series in the forward direction with the emitter of the first transistor of the right shoulder of the trigger; the power supply bus and the other output of the resistor divider is connected to the emitter of another additional transistor with a pn conductivity, the collector of which is connected to the common bus, and the bases mentioned olnitelnyh transit tori are connected to a regulated source voltage. Sources of information taken into account during the examination 1.I. Stepanenko. Fundamentals of the theory of transistors and transistor circuits. M. , Energie, 1977.

2.Trohimenko Y.K. Transistors in electronic circuits. -Kiev, 1963, p.127

3. Authors certificate of the USSR 129755, cl. H 03 K 3/64, 1960 (prototype). Priority dated October 22, 1971 by application 1707923.