SU1169159A1 - Selector of pulses having with given width - Google Patents

Abstract

SELECTOR OF PULSES OF A DEFINED LENGTH containing a pulse shaper of reference duration, the output of which is connected to the first input of the first element I through the shaper of the front edge of the reference pulse, the second input of which is connected to the output of the shaper front of the input pulse and the input of the gate strobe of the pulse, the output of the pulse of the input pulse and the input of the gate strobe of the pulse, the output of the pulse of the input pulse of the input pulse, and the input of the gate strobe of the pulse, the output of the pulse edge of the input pulse the input of the pulse shaper of the reference duration, the second input of which is connected to the input of the shaper of the trailing edge of the input pulse It is connected to the input bus, the RS trigger, the output of which is connected to the first input of the second element I, and the third element I, characterized in that, in order to improve the reliability of selection of adjacent pulses, a pulse counter, a decoder and a serially connected single vibrator are entered into it , the reset pulse shaper and the delay element whose output is connected to the reset input of the pulse counter, the summing input of which is connected to the output of the first element AND and the R input of the RS flip-flop, whose S input input i is connected to the input bus (L And what are the outputs of the bits of the pulse counter connected to the inputs of the decoder, the output of which is connected to the first input of the third element I, the output of which is connected to the output bus, and the second input to the output of the one-vibrator, the first input of which is connected to the output of the pulse former, the reference duration, and 05 second input - to the output of the second QD ment And, the second input of which is connected to the output of the strobe pulse shaper .. co

Description

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The invention relates to a pulse technique and can be used in automatic devices for selecting a given number of pulses, in digital data transmitting and receiving devices.

The purpose of the invention is to increase the reliability of selection of adjacent pulses by introducing a restriction on a time interval during which a series of pulses of a given duration can be received.

FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 g time diagrams of his work.

The pulse selector of a given length contains the shaper 1 of the reference duration, the shaper 2 of the rear edge of the input pulse, the shaper 3 of the hind edge of the reference pulse, the shaper 4 of the pulse, the first element And 5, RS-flip-flop 6, the second element And 7, one-shot 8, the pulse shaper 9 pulse reset, the delay element 10, the pulse counter 11, the decoder 12, the third element And 13, the input bus 14 and the output bus 15.

The input bus 14 is connected to the second input of the imaging unit 1 of the reference duration, the input of the imaging unit 2 rear edge of the input pulse and S-input-RS-flip-flop 6. The output of the imaging unit 1 is connected to the k input of the imaging unit 3 of the rear edge of the reference pulse and the launch input (first input) of the single-vibration 8 , the reset input (second input) of which is connected to the output of the second element I. The output of the imager 2 of the trailing edge of the input pulse is connected to the input of the imager 4 of the pulse and the second input of the first element I 5, the first input of which is connected to the output of the imager 3 of the trailing edge of the reference pulse. The output of the driver 4 of the strobe pulse is connected to the first input (reset input) of the driver 1 of the reference duration and the second input of the second element 7, the first input of which is connected to the output of the RS flip-flop 6, the R-input of which is connected to the output of the first element And 5 and the summing input counter 11 pulses. The output of the one-shot 8 is connected to the second input of the third element And 13 and the input

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shaper 9 pulse reset, the output of which through the delay element 10 is connected to the reset input of the pulse counter 11, the outputs of which 5 are connected to the inputs of the decoder 12, the output of which is connected to the first input of the third element 13 and the output of which is connected to the output bus 15.

10 The device works in the following way.

Each of the pulses of the input sequence (figa) front edge starts the imaging unit 1,

15 intended for generating pulses of a reference duration (FIG. 2 d) and throws the RS flip-flop 6 into a single state (FIG. 2) thereby opening the element AND 7. At

 By this, the one-shot 8 is started on the leading edge of the first pulse (Figure 2c). Shaper 2 and 3 in the pulse pulses corresponding to the rear fronts of the input and reference

 pulses (Fig.2 &,) and arriving at both inputs of the element I 5, at the output of which a pulse is obtained, only if the duration of the input and reference pulses

0 are equal (fig.2e). The coincidence pulses are fed to the summing input of the pulse counter 11 and to the R input of the RS flip-flop 6, the Shaper 4 of the pulse is designed to force

5 reset shaper 1 and one-shot. torus 8 in cases where the duration of the input and reference pulses are not equal (Fig. 2B).

In the case when the input selector

0 receives a sequence of n pulses of a given duration, on the leading edge of the first pulse

RS flip-flop 6 is transferred to one state and one 5 vibrator 8 is triggered, the output of which closes the output element AND 13 for a time equal to. When the durations of each of the n pulses of the input sequence and the reference pulses at the output of the element And 5 coincide, the pulses appear matches, which are then fed to the summing input of the counter 11 pulses and to the R input of the RS flip-flop 6, tilting

5 it is in the zero state and thus the element I 7 is closed for the passage of a gating pulse from the output of the shaper 4 to the reset input of the one-vibrator 8. When a pulse 11 of pulses n pulses of coincidence pulses arrives at the summing input of the counter, then the time interval generated by the single vibrator 8, has not yet finished, at the output of the decoder 12, the Vits signal (FIG. 2m), which, however, cannot appear on the code of the And element 13, while the inhibitory signal is acting on the second input. At the end of the time interval of the imp. About the presence of a signal at the output of the decoder 12 at the output of the element I 13, the selection signal (fig.2n) and at the output of the imager 9 (figure 2k) - the signal corresponding to the falling edge of the pulse from the one-shot 8 which is delayed by the time delay element 10, which determines the duration of the selection pulse (Fig. 2L), and then enters the reset input of the pulse counter 11 and returns the selector to its initial state.

If by the end of the time interval formed by the bdnovibrator 8, the summing input of the pulse counter 11 is received more or less than n matching pulses, then there will be no signal at the output of the decoder 12, and therefore there will be no selection signal at the output of the And 13 element.

In case the input pulse arrives at the selector input, the duration of which is not equal. The duration of the reference pulse, the output pulse of the element 5 does not appear to coincide, with the result that the trigger 11 will remain in one state and passing the gating pulse from the code of the shaper 4 to the reset input of the one-shot 8 and the shaper 1. The strobe pulse performs a forced reset of the shaper 1 and the one-shot 8 and thereby returns the selector to its initial state.

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Claims (1)

PREPARED DURATION PULSE SELECTOR, comprising a pulse shaper of reference duration, the output of which is connected via a shaper of the leading edge of the reference pulse to the first input of the first element AND, the second input of which is connected to the output of the shaper of the front of the input pulse and the input of the gate driver of the gate, the output of which is connected · With the first input of the pulse former of the reference duration, the second input of which is connected to the input of the driver of the trailing edge of the input pulse and under the RS-flip-flop, the output of which is connected to the first input of the second element And, and the third element And, characterized in that, in order to increase the reliability of the selection of adjacent pulses, a pulse counter, a decoder and a series-connected single-shot, shaper are connected to the input bus a reset pulse and a delay element, the output of which is connected to the reset input of the pulse counter, the summing input of which is connected to the output of the first AND element and the R-input of the RS-flip-flop, the S-input of which is connected to the input bus, and the discharge outputs the pulse counter is connected to the inputs of the decoder, the output of which is connected to the first input of the third AND element, the output of which is connected to the output bus, and the second input is the χ output of the one-shot, the first input of which is connected to the output of the pulse shaper. reference duration, and the second input to the output of the second element And, the second input of which is connected to the output of the gate pulse generator. ™ SU „„ 1169159