SU945992A2

SU945992A2 - Narrow-band electronic relay

Info

Publication number: SU945992A2
Application number: SU803226558A
Authority: SU
Inventors: Алфей Михайлович Кувшинов; Наталья Александровна Беляева; Светлана Николаевна Кувшинова
Original assignee: Предприятие П/Я Р-6234
Priority date: 1980-11-12
Filing date: 1980-11-12
Publication date: 1982-07-23

Description

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Изобретение относитс к импульсной технике и может.быть использовано в устройствах автоматики дл преобразовани входного переменного напр жени полезного сигнала с известной частотой в импульсный сигнал,The invention relates to a pulse technique and can be used in automation devices for converting an input alternating voltage of a useful signal with a known frequency into a pulse signal,

По основному авт. св. № известно узкополосное электронное реле, содержащее входной усилитель, два управл емых аналоговых ключа, соединенных с фильтрами низкой частоты и с генератором опорного напр жени , источник опорного напр жени , подключенный через резистор св зи к компаратору, третий управл емый аналоговый ключ, соответствующие выводы которого подключены параллельно выходам фильтров низкой частоты и к генератору управлени , и блок временной задержки, подключенный к выходу компаратора l .According to the main author. St. No. a narrowband electronic relay containing an input amplifier, two controllable analog switches connected to low-frequency filters and a reference voltage generator, a reference voltage source connected to a comparator through a communication resistor, the third controlled analog switch, the corresponding outputs of which are connected in parallel with the low-frequency filter outputs to both the control generator and a time delay unit connected to the comparator output l.

Недостатком известного устройства вл етс большое врем восстаЧ овлени , определ емое посто ннойA disadvantage of the known device is the long recovery time, determined by the constant

времени фильтров низкой частоты (полосой пропускани ) и величиной сигнала , предшествовавшего исчезновению входного сигнала.the time of the low frequency filters (bandwidth) and the magnitude of the signal that preceded the disappearance of the input signal.

Цель изобретени - уменьшение времени восстановлени .The purpose of the invention is to reduce the recovery time.

Поставленна цель достигаетс тем, что в узкополосное электронное реле введены транзистор и четыfO ре диода, одноименные выводы диодов подключены к коллектору транзистора, другие выводы диодов соединены с конденсаторами фильтров низких частот , база транзистора через резистор соединена с выходом компаратора , эмиттер транзистора подкпючен к клемме источника писани одного знака, а коллектор через нагрузочный резистор - к клемме источника питани другого знака.The goal is achieved by introducing a transistor and four o diodes into a narrow-band electronic relay, diodes of the same name are connected to the collector of the transistor, other diodes are connected to low-pass filter capacitors, the base of the transistor is connected to the source writing one sign, and the collector through a load resistor to the power supply terminal of another sign.

На чертеже изображена структурна электрическа схема репе.The drawing shows a structural electrical turnip circuit.

Claims

Amplifier 1 is loaded on low-pass filters 2 and 3. The reference voltage generator A is connected to controlled analog switches 5 and 6. Low frequency filters 2 and 3 are connected via a block 7t to another input to control generator 8 and connected to the input of comparator 9. Block 7 includes weight resistors to sum the signals from filters 2 and 3 low frequencies with a given weight, resistors for setting the threshold of a comparator with a voltage source, a third controlled analog switch. The output of the comparator 9 is connected to the block 10 BpeMeHHovi of the delay. The transistor 11 is connected to the base terminal through the resistor 12 to the output of the comparator 9. The same-side terminals of the diodes 13-16 are connected to the collector of the transistor 11 connected to the terminal 17 of the power source of one character, and the collector through a resistor 18 to the terminal 19 of the power source of another character. The device operates as follows. If there is no signal at the input of amplifier 1, the comparator 9 outputs a zero voltage, while the transistor 11 is open and the diodes 13-15 are closed. In this mode, newly introduced elements do not affect the operation of the narrowband electronic relay. When a signal arrives at the input of amplifier 1 with a frequency equal to the frequency of the generator k of the reference voltage and in a manner that exceeds the threshold set in Ylok 7, the comparator 9 starts producing pulses of positive polarity. The time delay unit 10 is triggered and outputs a voltage, the value of which corresponds to the presence of a signal at the input of an electronic relay that exceeds the operation threshold. When the comparator 9 is triggered, transistor 11 is closed by a positive polarity pulse. This opens the diodes 13-16 and the low-pass filter capacitors. 2 and 3, are discharged. The voltage across the capacitors of the low frequency filters 2 and 3 due to the periodic discharge cannot increase significantly above the threshold level. Therefore, the recovery time of the electronic relay to the initial state after the input signal disappears is reduced. Thus, leading the transistor and four diodes to the narrowband electronic relay reduces the recovery time by 3 times with a slight change in the probability of the detection characteristic of a sinusoidal signal in the presence of white noise with a bandwidth of XJ 10 times the relay filter bandwidth. Claims of the invention Narrow-band electronic relay according to aut. St. f 6 41651, characterized in that, in order to reduce the recovery time, a transistor and four diodes are inserted into it, the diode terminals of the same name are connected to the collector of the transistor, other diode terminals are connected to low-pass filter capacitors, the comparator output is connected through a resistor The emitter of the transistor is connected to the terminal of the power source of one character, and the collector through the load resistor to the terminal of the power source of another character. Sources of information taken into account in the examination of 1, USSR Copyright Certificate No. 641651. cl. H 03 K 17/02, 1979.

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