SU708528A2

SU708528A2 - Arrangement for measuring pulse electric signals

Info

Publication number: SU708528A2
Application number: SU782654085A
Authority: SU
Inventors: Николай Владимирович Лещинский; Александр Дмитриевич Аксютин
Original assignee: Предприятие П/Я Г-4492
Priority date: 1978-07-31
Filing date: 1978-07-31
Publication date: 1980-01-05

Description

Изобретение относится к технике связи, может использоваться в системах передачи данных.The invention relates to communication technology, can be used in data transmission systems.

По основному авт. св. № 4W887 известно устройство для формирования двухполюсных телеграфных сигналов, содержащее бпокинг-генератор с секционированной обмоткой обратной связи и выходными обмотками, подключенными к электрон-..According to the main author. St. No. 4W887, a device for generating bipolar telegraph signals is known, comprising a bocking generator with a sectioned feedback winding and output windings connected to an electronic ..

Я» to ному репе на транзисторах, транзисторные ключи реле соединены с двумя выходными обмотками бпокинг-генератора, причем в две обмотки обратной связи бпокинг-генератора включены два транэнстора, эмиттеры которых соединены с концами обмотки обратной связи, а коллекторы - с минусом источника питания. При этом база одного транзистора служит входом устройства, база другого соединина с точкой нулевого потенциала, а средний вывод’; обмотки обратной связи подключен через резистор к плюсу источника питания [1] .In turn, on transistors, transistor relay keys are connected to two output windings of the bocking generator, and two transistors are included in two feedback windings of the bocking generator, the emitters of which are connected to the ends of the feedback winding, and the collectors with the minus of the power source. In this case, the base of one transistor serves as the input of the device, the base of the other is connected to the point of zero potential, and the average output is ’; feedback windings are connected through a resistor to the plus of the power supply [1].

Однако такое устройство имеет невысокую точность.However, such a device has a low accuracy.

Цель изобретения - повышение точности формирования сигналов.The purpose of the invention is to improve the accuracy of signal formation.

Для этого в устройство дпя формирования двухполюсных телеграфных сигналов, содержащее бпокинг-генератор с секционированной обмоткой обратной связи и выходными обмотками, подключенными к электронному репе на транзисторах, которые соединены с двумя выходными обмотками бпокинг-генератора, причем в две обмотки обратной связи бпокинг-генератора включены два транзистора, эмиттеры которых соединены с концами обмотки обратной связи, в коллекторы с минусом источника питания, при этом база одного транзистора служит входом устройства, база другого соединена с точкой нулевого потенциала, а средний вывод обмотки обратной связи подключен через резистор в плюсу источника питания, введены дополнительный транзистор и дополнительный резистор, первый вы708528 вод которого соединен с анодом стабилитрона и базой дополнительного транзистора, эмиттер которого через резистор подключен к плюсу источника питания, который соединен с катодом стабииит- ₅рона, причем коллектор дополнительного транзистора соединен со средним выводом обмотки обратной связи, а второй вывод дополнительного резистора подключен к точке нулевого потенциала. 10To this end, in a device for generating two-pole telegraph signals, comprising a bocking generator with a sectioned feedback winding and output windings connected to electronic turnips on transistors that are connected to two output windings of the bocking generator, and two feedback windings of the bocking generator are included two transistors, the emitters of which are connected to the ends of the feedback winding, to the collectors with a minus power supply, while the base of one transistor serves as the input of the device, the base of the other It is connected to a point of zero potential, and the middle terminal of the feedback winding is connected through a resistor to the plus of the power supply, an additional transistor and an additional resistor are introduced, the first output of which is connected to the anode of the zener diode and the base of the additional transistor, the emitter of which is connected through the resistor to the plus of the power source which is connected with the cathode ₅ stabiiit- Ron, the additional transistor collector is connected to the middle terminal of the feedback winding and the second terminal further rezis ora is connected to the point of zero potential. 10

На чертеже дана принципиальная электрическая схема предложенного устройства.The drawing shows a circuit diagram of the proposed device.

Устройство содержит бпокинг-генератор 1 с секционной обмоткой 2 обратной 15 связи и выходными обмотками 3, электронное реле на транзисторах 4,5, 6,7, источник 8 питания, транзисторы 9 - 11, резистор 12, стабилитрон 13, нагрузку 14, диоды 15, 16 и резистор 17. 20The device contains a bocking generator 1 with a sectional winding 2 of feedback 15 and output windings 3, an electronic relay on transistors 4,5, 6,7, power supply 8, transistors 9 - 11, resistor 12, zener diode 13, load 14, diodes 15 , 16 and resistor 17.20

Устройство работает следующим образом.The device operates as follows.

При подаче на вход сигнала положительной полярности транзистор 9 закрыт, транзистор 10 открыт. Через открытый 25 транзистор 10 нижняя половина секционной обмотки 2 соединена с минусом источника 8, цепь отрицательной обратной связи замкнута, блокинг-генератор 1 не > работает. Так как импульсы с выходных 30 обмоток 3 на базы транзисторов 4 и 6 не поступают, эти транзисторы находятся в закрытом состоянии, а транзисторы 5 и 7 находятся соответственно в закрытом и открытом состояниях. Нагруз- ₃₅ка 14 через открытый транзистор 7 подключена к минусу источника 8.When applying a positive polarity signal to the input, transistor 9 is closed, transistor 10 is open. Through the open 25 transistor 10, the lower half of the sectional winding 2 is connected to the minus of the source 8, the negative feedback circuit is closed, the blocking generator 1 does not> work. Since pulses from the output 30 of the windings 3 do not arrive at the bases of transistors 4 and 6, these transistors are in a closed state, and transistors 5 and 7 are respectively in a closed and open state. The load is ₃₅ ka 14 through an open transistor 7 is connected to the minus of the source 8.

При смене полярности входного сигнала с положительной на отрицательную транзистор 9 открывается, подключая к до минусу источника 8 верхнюю половину секционной обмотки 2, цепь положительной обратной связи замыкается. Тран- , зистор 10 закрывается, отключая нижтою половину секционной обмотки 2 от минуса ₄₅источника 8, цепь отрицательной обратной связи размыкается. Бпокинг-генератор 1 начинает вырабатывать импульсы с периодом следования, близким по длительности .ко времени переключения транзистора 4 и 6.When the polarity of the input signal is changed from positive to negative, the transistor 9 opens, connecting to the minus source 8 the upper half of the sectional winding 2, the positive feedback circuit closes. Tran-, the resistor 10 is closed, disconnecting the lower half of the sectional winding 2 from the minus _{45 of the} source 8, the negative feedback circuit is opened. The bocking generator 1 begins to generate pulses with a repetition period close in duration to the switching time of transistor 4 and 6.

Импульсы бпокпнг-генератора с выходных обмоток 3 через диоды 15, 16, выделяющие отрицательную часть этих импульсов, поступают на базы транзис— ₅₅торов 4 и 6 и открывают их до состояния 'насыщения.The pulses of the bpocking generator from the output windings 3 through diodes 15, 16, which isolate the negative part of these pulses, go to transformer bases _{55 of} tori 4 and 6 and open them to the state of saturation.

Благодаря высокой инерционности транзисторов 4 и 6 в состоянии насы щения, их коллекторные токи не успевают изменяться с частотой следования импульсов и повторяют их огибающую.Due to the high inertia of transistors 4 and 6 in the saturation state, their collector currents do not have time to change with the pulse repetition rate and repeat their envelope.

Открывание транзистора 4 приводит к открыванию транзистора 5, а открывание транзистора 6 - к закрыванию транзистора 7. В результате нагрузка 14 отключается от минуса источника 8 и подключается через открытый транзистор 5 к его полюсу.The opening of the transistor 4 leads to the opening of the transistor 5, and the opening of the transistor 6 leads to the closing of the transistor 7. As a result, the load 14 is disconnected from the minus of the source 8 and connected through the open transistor 5 to its pole.

Величина входного сигнала, необходимая для срабатывания переключающих секционную обмотку 2 транзисторов 9 и 10 (порог срабатывания), зависит от величины тока смешения, протекающего от плюса источника 8 через'резистор 17, транзистор 11, секционную обмотку 2 обратной связи и транзисторы 9 и 10. Существует оптимальное значение тока смещения, при котором ошибка сравнения входного напряжения с напряжением нулевого потенциала минимальна. Токозадающий каскад на транзисторе 11 стабилизирует величину тока смещения и тем самым уменьшает нестабильность порога срабатывания.The magnitude of the input signal necessary for the operation of the transistors 9 and 10 switching the sectional winding 2 (threshold), depends on the magnitude of the mixing current flowing from the plus of the source 8 through the resistor 17, transistor 11, sectional feedback winding 2 and transistors 9 and 10. There is an optimal value of the bias current at which the error in comparing the input voltage with the voltage of zero potential is minimal. The lead-in cascade on the transistor 11 stabilizes the bias current and thereby reduces the instability of the threshold.

Таким образом, в описанном устройстве повышается стабильность порога срабатывания транзисторов 9, 10, переключающих обратную связь блокинг-генератора 1, и, следовательно, уменьшаются временные искажения токовых посылок, управляющих оконечным телеграфным устройством.Thus, in the described device, the stability of the threshold of the operation of transistors 9, 10, switching the feedback of the blocking generator 1 is increased, and, consequently, the temporary distortions of the current packages controlling the terminal telegraph device are reduced.

Claims

The invention relates to a communication techgeon, which can be used in data transmission systems. According to the main author. St. No. 416887, a device for generating two-pole telegraph signals is known, comprising a bocking generator with a sectioned feedback winding and output windings connected to an electronic relay at transistors, transistor switches of the relay connected to two output windings of the blocking generator, and in two reverse windings The bpocking generator connections include two transistors, the emitters of which are connected to the ends of the feedback winding, and the coppector is connected to the minus of the power supply. The base of one transistor serves as the input of the device, the base of the other is connected to the point of zero potential, and the middle OUTPUT of the feedback winding is connected through a resistor to the positive power source i. However, such a device has a low accuracy. The purpose of the invention is to improve the accuracy of the formation of signals. For this purpose, a device for generating bipolar telegraph signals containing a block generator with a sectional feedback winding and output windings connected to an electronic turnips on transistors that are connected to two output windings of a blocking generator, and in two feedback windings blocking the generator includes two transistors, the emitters of which are connected to the ends of the feedback winding, in collectors with a minus power source, and the base of one transistor serves as an input to the device, the base the other is connected to the point of zero potential, and the middle terminal of the feedback winding is connected through a resistor in the plus of the power source (an additional transistor is introduced). and an additional resistor, the first of which is connected to the anode of the stabilizer of the throne and the base of an additional transistor, the emntter of which is connected via a resistor to the positive power source, which is connected to the cathode of the zener diode, the collector of the additional transistor is connected to the middle feedback winding, and the second the output of the additional resistor is connected to the point of zero potential. In the drawing, the circuit diagram of the proposed device is given. The device contains a blocking generator 1 with a sectional winding 2 reverse cBsi3H and output windings 3, an electronic relay transistors 4.5, 6.7, n the power supply 8, transistors 9-11, resistor 12, Zener diode 13, load 14, diodes 15 , 16 and resistor 17. The device operates as follows. When a positive polarity signal is applied to the input, the transistor 9 is closed and the transistor 1O is open. Through the open transistor 10, the lower half of the sectional winding 2 is connected to the minus of the source 8, the negative feedback circuit is closed, the blocking Generator 1 does not work. Since the pulses from the output windings 3 do not arrive at the bases of transistors 4 and 6, these transistors are in the closed state, and transistors 5 and 7 are in the closed and open states, respectively. The load 14 through the open transistor 7 is connected to the source 1 linus 8. When the input signal changes from positive to negative transistor 9, the upper half of the sectional winding 2 is connected to the minus of the source 8, the positive feedback circuit is lost. The transistor Yu is closed by disconnecting the lower half of the sectional winding 2 from minus source 8, the negative feedback circuit is opened. The blocking generator 1 begins to generate pulses with a follow-up period close in duration to the switching time of the transistor 4 and 6. The pulses of the blocking generator from the output windings 3 through the diodes 15, 16, which produce the negative part of these pulses, enter the transistor bases tori 4 and 6 and open them up to the state of shishing. Due to the high inertia of the transistors 4 and 6 in the state of saturation p1e1sh, their collector currents do not have time to change with the pulse frequency and repeat their envelope. The opening of the transistor 4 leads to the opening of the transistor 5, and the opening of the transistor 6 leads to the closing of the transistor 7. As a result, the load 14 is disconnected from the M1 of the source 8 and connected through the open transistor 5 to its pole. The magnitude of the input signal needed to trigger the switching sectional winding 2 transistors 9 and 10 (response threshold) depends on the magnitude of the bias current flowing from the plus source 8 through the resistor 17, the transistor 11, the feedback sectional winding 2 and transistors 9 and 10. There is the optimum value of the bias current at which the error of comparing the input voltage with the voltage of zero potential is minimal. The current setting cascade on the transistor And stabilizes the magnitude of the bias current and thereby reduces the instability of the threshold response} w. Thus, in the described device, the stability of the threshold of operation of the transistors 9, 10, switching feedback of the blocking generator 1, and, consequently, reducing the temporal distortions of the current parcels, controllap1, their terminal telegraph device, increases. The invention The device for the formation of bipolar telegraph signals according to the ed. St. No. 416887, characterized in that, in order to increase the formation accuracy, an additional transistor and an additional resistor are introduced, the first terminal of which is connected to the anode of the Zener diode and the base of the additional transistor, the emitter of which is connected to the positive side of the power source through the resistor the auxiliary transistor collector is connected to the middle terminal of the feedback winding, and the second terminal of the additional resistor is connected to the point of zero potential. Sources of information accepted; due attention in the examination 1. USSR author's certificate N 416Б87, cl. H O1 B l / OO, 1971 (prototlp).