SU1443148A1 - Device for detecting pulse loss - Google Patents

Abstract

The invention relates to a pulse technique and can be used to control periodic pulse sequences in control and regulation systems. The aim of the invention is to enhance the functionality of the device by detecting a spurious signal and restoring the sequence of clock pulses. The goal is achieved by the addition of elements AND 6, 8, and 9, element OR 5, and timer 7, operating in a multivibrator mode, into the device. In addition, the device contains a delay element 1, a TEMPLE OR 2 element, an AND 3 element, an OR 4 element, 11, 12, and 13 device outputs. When the device is in operation, as a result of the addition of pulse sequences, the output of the element OR 5 forms a recovered from loss and a cleanse from spurious signals a pulse sequence. The outputs of the elements And 8 and 9 are indicators of the presence of missing and false pulses, respectively. 2 Il. cl

Description

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The invention relates to a pulse technique and can be used in the control of periodic pulse sequences, in control and regulation systems. The purpose of the invention is to extend the functionality by detecting a spurious signal and restoring the sequence of clock pulses - achieved by additionally entering the second, third and fourth AND circuit, the second OR element, and the timer used in the one-shot mode.

Figure 1 shows the block diagram of the device; figure 2 - timing diagram of the device.

A device for detecting the loss of a pulse contains a delay element 1, an EXCLUSIVE OR element 2, the first element OR 4, the second element OR 5, the second element AND 6, the timer 7, the third 8, the fourth 9 And elements, the input 10 of the device, the first 11, the second 12 and The third 13 outputs of the device.

The input 10 of the device is connected to the input of the delay element 1, to the first input of the EXCLUSIVE OR 2 element, to the first input of the first element OR 4 and the first input of the second element AND 6, to the second input of which is connected the inverse output of the timer 7 and the first input of the third element AND 8, the output of which is the first output 11 of the device and is connected to the first input of the second element OR 5 and the second input of the first element OR 4, the output of which is connected to the input of timer 7 The output of the delay element 1 is connected to the second input of the first element AND 3 and to the second input EXCLUSIVE OR 2 element, the output of which is connected to the first input of the first element And 3, and its output is connected to the second input of the third element And 8 and the first input of the fourth element And 9, the second input of which is connected to the inverse output of timer 7, and the output is output 12, the output of the second element OR 5 is the output 13 of the device.

A device for detecting loss of impulse is working as follows. zom.

The input periodic sequence of sync pulses is compared with the pulse pulse delayed by the period following the input signal.

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The succession (Fig. 2b) on the EXCLUSIVE OR 2 element. As a result of the comparison, the output of the EXCLUSIVE OR 2 element produces false imitations, pulses delayed during the following sequence of the input sequence, the recovered impulse following the missing impulse of the input sequence, the first impulse sequence (figv). This sequence, connected to the first input of the first element And 3, is compared to match the delayed delay element 1 for the input sequence on the first element 3. As a result, the output pulses of the first element And 3 output false delays relative to the input sequence for the period of the input signal, and the recovered missing pulse (figd). These signals are fed to the first input of the third element And 8 and to the first input of the fourth element And 9.

The timer 7, operating in the one-shot mode, is cocked by the falling edge of the input sequence through the element OR 4 and is reset before the end of the pause between the pulses of the periodic sequence (Fig. 2d and d). The inverse output of timer 7 controls the passage of input pulses through the second element And b, allowing the passage of the pulses of the sequence and prohibiting the passage of pulses in the pause between the impulses tti. As a result, a sequence of input pulses without spurious pulses (Fig. 2e) appears at the output of AND 6, and a restored pulse of the input sequence (Fig. 2g) appears at the output of the third And 8 element. As a result of the addition of the sequences (Fig. 2g and e), on the output of the element OR 5, a pulse sequence is recovered from the loss and elimination of spurious signals. The outputs of the third element And 8 and the fourth element And 9 are indicators of the presence of missing and spurious pulses, respectively.

Invention Formula

A device for detecting the loss of a pulse, containing a delay element

ki, the input of which is connected to the input bus and the first input of the UTI1K - TONING OR element, the second input of which is connected to the output of the delay element and the first input of the first element AND, the second input of which is connected to the output of the EXCLUSIVE OR element, the first element OR, the first input of which is connected with the input bus, which differs from the fact that, in order to extend the functionality by detecting a spurious signal and restoring the sequence of clock pulses, the second, third and fourth elements Tbrii, and Hilti second element and a timer, wherein the input line is connected to the first input of the second eleT8h

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And, the second input of which is connected to the inverse output of the timer and the first input of the third element AND, the output of which is connected to the first output bus, with the first input of the second OR element and the second input of the first OR element, the output of which is connected to the input of the timer, whose direct output connected to the second input of the fourth element And, to the first input of which is connected the output of the first element And the second input of the third element And, the output of the second element And connected to the second input of the second element OR, the output of which is connected to the second output bus, and the output of the fourth element And is connected to the third output bus.

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Claims (1)

Claims A device for detecting a pulse loss, comprising a delay element, the input of which is connected to the input bus and the first input of the EXCLUSIVE OR element, to the second input of which is connected the output of the delay element and the first input of the first AND element, the second input of which is connected to the output of the EXCLUSIVE OR element, the first OR element, the first input of which is connected to the input bus, characterized in that, in order to expand functionality by detecting a false signal and restoring the sequence, the clock s, in it, additionally 15, the second, third and fourth AND elements, the second OR element and a timer are introduced, while the input bus is connected to the first input of the second AND element, the second input of which is connected to the inverse output of the timer and the first input of the third AND element, the output of which is connected to the first output bus, with the first input of the second OR element and the second input of the first OR element, the output of which is connected to the timer input, the direct output of which is connected to the second input of the fourth AND element, the output of which is connected to the first input the first element And and the second input of the third element And, the output of the second element And is connected to the second input of the second element OR, the output of which is connected to the second output bus, and the output of the fourth element And is connected to the third output bus.