SU815885A1

SU815885A1 - Selector of pulse by duration

Info

Publication number: SU815885A1
Application number: SU792777079A
Authority: SU
Inventors: Владимир Ефимович Дереновский; Виктор Казимирович Кижель; Галина Анатольевна Шахрай
Original assignee: Войсковая часть 10729
Priority date: 1979-06-07
Filing date: 1979-06-07
Publication date: 1981-03-23

Description

(54) СЕЛЕКТОР ИМПУЛЬСОВ ПО ДЛИТЕЛЬНОСТИ(54) SELECTOR OF PULSES OF DURATION

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Изобретение относитс к импульсной технике и может быть использовано в радиотехнических устройствах различного назначе; ни , в частности В телемеханике.The invention relates to a pulse technique and can be used in radio engineering devices for various purposes; nor, in particular, in telemechanics.

Известно устройство, содержащее генератор тактовых импульсов, элементы совпадени , дифференцирующий элемент, счетчик импульсов, дещифраторы, триггеры, усилитель , ограничитель и элемент задержки 1.A device is known comprising a clock, a matching element, a differentiating element, a pulse counter, decipherors, triggers, an amplifier, a limiter, and a delay element 1.

Недостатком известного устройства вл етс то, что при совпадении заднего фронта селектируемого импульса с импульсом, сформированным устройством, на выходе по вл етс сигнал, при этом устройство возвращаетс в исходное состо ние задним фронтом селектируемого импульса, поступающим через элемент задержки, вследствие чего при селекции импульсов длительностью больще заданной происходит сбой, так как устройство не готово к приему очередного импульса.A disadvantage of the known device is that when the falling edge of the selectable pulse coincides with the pulse generated by the device, a signal appears at the output, and the device returns to its initial state by the falling edge of the selectable pulse arriving through the delay element. a duration longer than the specified one fails, because the device is not ready to receive the next pulse.

Наиболее близким по технической сущности вл етс устройство, содержащее триггер , генератор импульсов, формирователи переднего и заднего фронтов и последовательно соединенные счетчик импульсов, дещифратор и элемент совпадени 2.The closest in technical essence is a device comprising a trigger, a pulse generator, front and rear edges formers, and a pulse counter connected in series, a descrambler and a coincidence element 2.

Недостатком известного устройства вл етс мала надежность при селектировании импульсов по длительности.A disadvantage of the known device is low reliability when selecting pulses by duration.

Цель изобретени - повыщение надежности селектировани .The purpose of the invention is to increase the reliability of selection.

Указанна цель досТ|Игаетс тем, что в селектор импульсов по. длительности, содержащий генератор тактовых импульсов, счетчик импульсов, выход которого через дещифратор соединен с первым входом элемента совo падени , а первый вход - с первым входом триггера, усилитель, элемент ИЛИ и дифференцирующий элемент, вход которого соединен с;входной щиной, введен дополнительный дифференцирующий элемент, вход которого Соединен с выходом дещифратора, The specified goal of DET | Igacks is that in the pulse selector on. duration, containing a clock pulse generator, a pulse counter, the output of which is connected to the first input of the coincidence element via a descrambler, and the first input to the first input of a trigger, an amplifier, an OR element and a differentiating element, the input of which is connected to; the element whose input is connected to the output of the descrambler,

5 а выход - с первым входом элемента ИЛИ, второй вход которого подключен к выходу элемента совпадени , третий вход - к второму входу элемента совпадени и выходу дифференцирующего элемента, а выход -5 and the output is with the first input of the OR element, the second input of which is connected to the output of the matching element, the third input to the second input of the matching element and the output of the differentiating element, and the output -

Claims

through the amplifier to the first input of the trigger, the second input of which is connected to the input width, the third input to the output of the clock generator, and the output to the second input of the pulse counter. FIG. 1 shows the structural electrical circuit of the device; in fig. 2 - diagrams explaining his work. The pulse selector has a duration of 1 clock pulse generator with an adjustable repetition period, the output of which through trigger 2 is connected to the first input of the counter 3 pulses, the second input of trigger 2 is connected to the input bus and the input of differentiating element 4, and the third input to the second input of the counter 3 whose output is connected via a decoder 5c with the first input of the coincidence element 6, the amplifier 7, the output of which is connected to the third input of the trigger 2, the differentiating element 8 is additional, the input of which is connected to the output of of the indicator 5, and the output with the first input of the element OR 9, the second input of which is connected to the output of the matching element 6, the third input to the second input of the matching element 6 and to the output of the differentiating element 4, and the output to the input of the amplifier 7. Pulse selector The duration works as follows. When selecting pulses with a duration of more than a given input pulse and the clock pulses of the generator 1 are fed to the inputs of trigger 2. The signal to the output of trigger 2 passes only during the time of action of the input signal (Fig. 2a, b. Those clock pulses that pass to the trigger output 2, is fed to the input of the counter 3. The period of the clock pulses, to the number of clock cycles counted by the counter 3, determine the accuracy of the device.When the counter 3 is in operation, a pulse of the decoder 5 is generated, which from the output of the decoder 5 enters the input element nta 6 coincidence. However, if the signal duration is longer than the specified one, then after counting at the cycle corresponding to the specified duration and the operation of the decoder 5, the signal from its output (Fig. 2c) goes to the input of differentiating element 8, which from its output through the element OR 9 and amplifier 7 is fed to the input "RESET counter 3 (Fig. 2 g). There will be no match at the output of element b. Counter 3 is reset. Thus, the proposed technical solution allows for the selection of a pulse with a duration longer than a preset to reduce the time of preparation of the selector to receive the next pulse following it, extending the limits of changing the interval () of pulse repetition, and consequently, reducing the probability of occurrence of failures, i.e. Increasing the reliability of selection. Invention The Pulse Selector is a pulse width selector comprising a clock pulse generator, a pulse counter whose output is connected to the first input of the coincidence element via a decoder, and the first input to the first trigger input, an amplifier, an OR element and a differentiating element whose input is connected to the input bus, characterized in that, in order to increase the reliability of selection, an additional differentiating element is introduced into it, the input of which is connected to the output of the decoder, and the output to the first input of the element OR, The swarm input is connected to the output of the coincidence element, the third input to the second input of the coincidence element and the output of the differentiating element, and the output through the amplifier to the first trigger input, the second input of which is connected to the input bus, the third input to the output of the clock generator, and output - with the second input of the pulse counter. Sources of information taken into account during the examination 1. USSR author's certificate No. 451186, cl. H 03 K 5/20, 1972.

2. USSR author's certificate number 540365, cl. H 03 K 5/18, 1975.

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