SU1716519A2 - Device for detecting losses of pulses - Google Patents

Abstract

The invention relates to a pulse technique. The aim of the invention is to expand the functionality of the device. The device for detecting the loss of pulses contains a generator of 6 clock pulses, the first 1, the second 4, the third 9, the fourth 14 triggers, the first 2, the second 15 and the third 16 elements AND, the first 3 and second 10 elements NOT, the IS-HE element 8, the first 17 and second 19 elements OR, first 12 and second 13 counters. The device for detecting the loss of pulses allows to extend the functionality by providing the possibility of restoring the input pulse train. 1 il.

Description

The invention relates to a pulse technique, can be used to detect the loss of clock pulses and their recovery in digital tracking systems controlled by computers, and is an improvement to the technical solution of the author. No. 1295397.

The purpose of the invention is to expand the functionality of the device by allowing the input pulse train to be restored.

The drawing shows a functional diagram of the device.

The device for detecting the loss of pulses contains trigger 1, element 2, element 3, trigger 4, output 5, generator 6 clock pulses, start input 7, AND-NE element 8, trigger 9, element 10, output 11, counters 12 , 13 trigger 14, elements AND 15, 16, element OR 17, installation input 18, element OR 19.

The device works as follows. At a normal clock sequence, a logical unit is present at input 7 of the device at the direct output of the first trigger 1, allowing the input clock sequence to pass from input 7 to output 11. At device output 5, there is a logical zero that blocks the third AND element sixteen.

Before starting operation, the fourth trigger 14 is brought to the unit state via the input 18 of the device, the first counter 12 being in the zero state, and the second counter 13 in the counting mode generated by the generator 6 pulses.

When the input clock sequence disappears, the first trigger 1 changes its state, as a result, the second element 15 will close, and the third element 16 will open. Generator 6 goes to reso

with

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auto-generation press and gives a high frequency. The second counter 13 is filled and outputs a pulse to the R input of the fourth trigger 14, which is zeroed. As a result, the second counter 13 is set to the zero state, and the first counter 12 starts counting pulses coming from the generator 6. As soon as the first counter 12 is filled, it will output a pulse to the S input of the fourth trigger 14, which changes its state to the opposite . The process will be repeated. As a result, at the output 1.1 of the device there will be a sequence of zero and unit potentials, and the duration of these potentials depends on the division ratio of the counters 12 and 13, which are selected from the condition of dividing the high frequency generator b into a frequency with duration of zero and one

 corresponding input durations

Tact frequency.

Thus, the start of device 11 will contain the restored input sequence of clock pulses.

Ф о рм ул а и з о b re tee. Device for detecting loss of impulses by aut. St. No. 1295397, characterized in that, in order to expand

functionality by providing the possibility of restoring the input pulse sequence, two counters, two elements IL AND, two elements AND, the fourth trigger are entered into the device, the counting inputs of the counters are connected to the output of the clock generator, the overflow outputs of the first and second counters are connected respectively but with the first input of the first element OR and the zero input of the fourth trigger, the inverse output of which is connected to the reset input of the second counter, the first input of the second element And soi with the inverse output of the first trigger, the second input and output of the first element OR are connected respectively to the installation input of the device and the single input of the fourth trigger, the direct output of which is connected to the second input of the second element AND and the reset input of the first counter, first and second inputs of the third element And are connected respectively to the input of the device Lusk and the direct output of the first trigger, the outputs of the second and third elements And are connected respectively to the first and second inputs of the second element OR, the output of which The output is the recovered pulse train of the device.

Claims (1)

Claim Device for detecting pulse loss by ed. St. Ns 1295397, characterized in that, in order to expand the functionality 'by providing the ability to restore the input pulse sequence, two counters, two OR elements, two AND elements, and a fourth trigger are introduced into the device, the counting inputs of the counters being connected to the output of the clock generator , the overflow outputs of the first and second counters are connected, respectively, with the first input of the first OR element and the zero input of the fourth trigger, the inverse output of which is connected to the reset input of the second of the counter, the first input of the second AND element is connected to the inverse output of the first trigger, the second input and output of the first IL element are connected to the installation input of the device and the unit input of the fourth trigger, the direct output of which is connected 20 to the second input of the second AND element and the reset input the first counter, the first and second inputs of the third element And are connected respectively with the start input of the device and the direct output of the first trigger, 25 outputs of the second and third elements And are connected respectively to the first and the second inputs of the second OR element, the output of which is the output of the reconstructed pulse train of the device.