SU1394425A1 - Pulsewidth selector - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automation, measurement technology and information processing systems for the selection of pulses of duration in a given range. The invention makes it possible to increase the speed of the device while maintaining the output pulse duration equal to the input pulse duration, which is achieved by reducing the pulse width generated by the second single vibrator, while at the same time increasing the reliability. The device contains the first one-shot 1, the input 2 of the device, the driver 3 of a short pulse, the elements 4 and 6 of the second 5 and the third 7 of the one-shot, the output 8 of the device. 2 Il. sh

Description

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The invention relates to a pulse technique and can be used in automation, measurement technology and information processing systems for selecting pulses by duration in a predetermined range.

The aim of the invention is to increase the speed while maintaining the duration of the output pulse, the duration of the input pulse, due to a decrease in the pulse width generated by the second one-vibrator, and simultaneous reliability

FIG. 1 is given a structural diagram of the pulse selector; in fig. 2 - time diagrams explaining the operation of the pulse selector.

The pulse selector contains a first one vibrator 1, the input of which is connected to the input 2 of the selector and the input of a short pulse shaper 3, the output of which is connected to the first input of the first element 4, the second input of which is connected to the direct output of the second single vibrator 5, the input of which is connected to the inverse the output of the first one-shot 1, and the inverse output with the first input of the second element And 6, the Output of the first element And is connected to the input of the third one-vibration 7, the output of which is connected to the second input of the second element And 6, the output of which is ene with 8 output selector.

The selector works in the following way.

In the initial state, the input and output selector levels are zero (Fig. 2a, e). An input pulse with a duration of ьGv is fed to the inputs of the first single-shot 1 and shaper 3 of a short pulse, which operate respectively on the leading and trailing edges of the input pulse.

The first one-shot 1 generates a pulse, the duration of which is equal to the lower selection threshold (l (FIG. 2U. This pulse goes to the input of the second one-shot 5, triggered on the falling edge of the pulse of length T and forming a pulse, the duration of which determines the selection interval where C is the top threshold selection (Fig. 2b).

From the direct output of the second one-shot 2 pulse with a duration of

enters the second input of the first element And 4 (Fig. 2 &). If during the action of this input pulse, the falling edge of the input pulse Tp is formed, then the shaper 3 short pulse (on the falling edge of the input pulse) generates a short pulse that passes through the first element I 4 to the input of the third single-oscillator 7 and triggers it (Fig. 2a).

The third one-shot 7 generates a pulse with a duration that arrives at the second input of the second element I. At the end of the pulse with a duration (Fig. 2), an output pulse is formed at the output of the selector, the duration of which is determined by the expression bi x (+) - ("in +) - (Fig. 2e).

. 0 5 o

five

five

0

five

0

Thus, when a pulse selector arrives at the input, the duration of which is in the interval. . In the output of the selector, a pulse is formed whose duration is equal to the duration of the input pulse, if the following frequency

(.)

If on-input selectors are received

pulses with duration

or Hz, then in the code the pulse does not form, since the first element AND 4 does not transmit the pulses of the former 3 to operate the third one-channel one 7.

Claims (1)

Invention Formula Pulse selector in duration, containing the first one-shot, the input of which is connected to the input of the selector and the input of the short pulse shaper, the output of which is connected to the first input of the first element I, the second input of which is connected to the direct output of the second one-shot, the inverse output of which is connected to the first input of the second element And, the second input of which is connected to the direct output of the third one-shot, the input of which is connected to the output of the first element And, the output of the second element And is connected to the output of the selector, different Yu-u, and with the fact that in order to increase the operating speed while maintaining the duration of the output pulse of equal duration and the input odno31394425 reliability time pitch, iy- is connected to the input of the second one-vibrational output of the first one-vibrator of the torus. FIG. 2