SU1555842A1 - Selector of sequence of given duration containing pulses of given duration - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automatic devices for selecting a given number of pulses of digital data receiving and transmitting devices. The aim of the invention is to increase the reliability of the selection of bursts of pulses by eliminating the possibility of changing the duration or disappearance of the selection pulse on the output bus. The selector sequence of a given duration, containing pulses of a given duration, contains shaper 1 pulses of the reference duration, shaper 2 rear edge of the reference pulse, 3 pulse counter, decoder 4, one-shot 5, shaper 6 reset pulses, delay element 7, shaper 8 count pulses, trigger 9 , input bus 10, output bus 12. The goal is achieved through the introduction of trigger 11 and the formation of new functional connections. 2 Il.

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 of digital data receiving and transmitting devices.

The purpose of the invention is to increase the reliability of the selection of pulse bursts by eliminating the possibility of changing the duration or disappearance of the selection pulse J on the output bus.

FIG. Figure 1 shows the electrical structure of the device; in fig. 2 - timing diagrams for the operation of the device.

The device contains a shaper 1 pulses of the reference duration, the output of which is connected to the shaper 2 of the trailing edge of the reference pulse, a counter of 3 pulses, the outputs of which JQ are the last selectable pulses

The bottom is connected to the inputs of the decoder k, and the reset input is connected to the second input of the one-vibrator 5, the output of which is connected to the input of the former 6 of the reset pulses, the output of which 25 of the selectable pulse will be

connected to the input of the element 7 delay. The counting input of the counter 3 is connected to the output of the imaging unit 8 counting pulses, and the reset input - with the output of the first trigger 9, whose C input is connected to the input bus 10, with the first input of the imaging unit 1 and the second input of the imaging unit 8. The output of the single-oscillator 5 is connected to C the input of the second trigger 11, the output of which is connected to the output bus 12, the D-input with the output of the decoder, and the R-input with the output of the delay element 7 and the R-input of the trigger E, the D-input of which is connected to the output of the imager 2, the first input of the single-oscillator 5, the second input shaper 1 and the first I home driver 8.

The device works as follows

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counted by the counter 3 and will cause the output at the output of the decoder 4 level logical 1, indicating the arrival of n-pulses specified for the duration. On the falling edge of the pulse formed by the single vibrator 5, the logic level 1 from the output of the decoder 4 will be overwritten to the direct output of the bus 12 of the trigger 11, and a pulse will be generated by the shaper 35 6 reset pulses, which will lead pulse selector to its original state. That is, the long pulse selection appearing on the output bus 12 of the device is determined by the delay time of the delay element 7.

If by the end of the time interval

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On the leading edge of the first impulse-45 determined by a single vibrator 5, on

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This sequence of n-pulses shaper 1 pulses of the reference duration generates a pulse whose duration determines the minimum duration of the selected pulses. The shaper 2 of the trailing edge of the reference pulse generates a pulse, the duration of which determines the maximum deviation to a larger direction of the duration of the selected 55 pulses from the duration of the reference pulses. Thus, if the duration of the selected pulses lies within the specified limits, the selector works as follows. On the falling edge of the first selectable pulse, trigger 9 is recorded in logic 1. The logic level O from the inverse output of trigger 9 removes the prohibition from starting the one-shot 5 and enables filling the counter 3- On the falling edge of the pulse generated by the driver 2, the one-shot 5 is started, the pulse duration of which is on - determines the half-max time interval between the first and the last nth selectable pulses, and the shaper 8 count pulses, which forms short pulses arriving at the counting input etchika 3. If the time interval between the first and.

in a pack of n-pulses less than the duration of the pulse generated by the one-oscillator 5, the pulse generated by the shaper 8 pulses

counted by the counter 3 and will cause the appearance at the output of the decoder level 4 logical 1, indicating the arrival of n-pulses of a given duration. On the falling edge of the pulse generated by the single vibrator 5, the logic level 1 from the output of the decoder 4 is rewritten to the direct output of the bus 12 of the trigger 11, and a pulse is formed by the shaper 6 of the reset pulses, which will lead the pulse selector to condition. That is, the duration of the selection pulse appearing on the output bus 12 of the device is determined by the delay time of the delay element 7.

If by the end of the time interval,

determined by one-shot 5, on

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Since the counting input of counter 3 is received more or less than n-pulses, then there will be no signal at the output of the decoder k, and therefore there will be no selection signal at the output of the trigger 11.

In the case of false short or long pulses in a pack of n-pulses, the first false pulse will set the logical 1 level on the inverse output of trigger 9, which will cause the pulse selector to reset.

Claims (1)

Invention Formula A selector of a sequence of predetermined duration, containing pulses of a predetermined duration, containing a pulse shaper of the reference duration, the first input of which is connected to the input bus and the output to the input of the trailing edge of the reference pulse, serially connected one-shot, shaper of reset pulses and delay element sequentially connected by a pulse counter and a descrambler, as well as a counting driver, a first trigger and an output bus, which is characterized in that and the reliability of the selection of bursts of pulses introduced into it a $ 6 g de f the second trigger, the output of which is connected to the output bus, the C input with the one-shot output, the D input with the output of the decoder, and the R input with the output of the delay element and the R input of the first trigger, whose D input is connected to the first input of the single-vibration with the output of the back edge driver of the reference pulse, with the second input of the pulse generator of the reference duration and with the first input of the counting pulse generator, the second input of which is connected to the input bus and 5 C input of the first trigger, and the output with the counting input of the pulse counter in One reset which is connected to the output of the first trigger and the second input of the one-shot. FIG. 2