SU815892A1 - Selector of pulse pairs of given duration - Google Patents

Description

(54) SELECTOR OF PAIRS OF PULSED DURABILITY

The invention relates to a pulse technique and can be used in automatic devices for selecting combinations of pairs of pulses of a given duration with a fixed number of video pulses between them from a sequence of pulses with a random front phase.

A device containing a standby multivibrator, signal conditioners corresponding to the falling edge of the input pulse and a pulse of the reference duration, the element AND and the driver of the gate reset pulse, a trigger, two elements AND, the elements OR and NOT 1 is known.

However, the known device does not have the ability to capture the moment of occurrence of a combination of pairs of pulses of a given duration with a fixed number of video pulses of a given duration with a fixed number of video pulses between them in a sequence of pulses with a random front phase.

The closest in technical essence is a device containing a pulse counter, the first input of which is connected to the output of the first element AND, the first

The input of which is connected to the output of the pulse generator, and the second input is connected to the output of the trigger, the first input of which is connected to the output of the first pulse generator, whose input is connected to the input bus, the first input of the inhibit element and the input of the second pulse generator, the output of which is connected through a delay element with the second input of the prohibition element, the output of which is connected via the third form of the Jel..multiple to the second inputs of the trigger and pulse counter and to the first input of the second element I, the second input of which is connected to the output ohm decoder, the inputs of which are connected to the outputs of the pulse counter 2.

However, the known device does not have the ability to capture the instant of the occurrence of a combination of pairs of pulses of a given duration with a fixed number of video pulses between them in a sequence of pulses with a random front phase. This limits the functionality of the known selectors, since in this combination additional information is transmitted.

The purpose of the invention is to expand the functionality of the known selectors of a pair of pulses of a given duration.

The goal is achieved in that a known selector of pulse pairs of a given duration, containing a trigger, the output of which is connected to the first input of the first element I, the output of which is connected to the first input of the second element. And, the pulse shaper, the input of which is connected to the input bus, the element delays, a NOT element, an OR element, an additional delay element, additional AND elements and a pulse selector of a given duration, the input of which is connected to the input bus, and the output through the element NOT to the second input One of the first element And, the third input of which is connected to the output of the pulse generator, with the input of an additional delay element, with the first trigger input, with the first inputs of additional And elements, the second inputs of which are connected to the additional outputs of the decoder, with the second input of the second element And, the third input which through the delay element is connected to the trigger output, the second input of which is connected to the dump bus and to the first input of the OR element, the output of which is connected to the second input of the pulse counter, and the second input - to the output of the additional delay element.

The drawing shows a structural electrical circuit of the device.

The device contains a selector 1 of pulses of a given duration, trigger 2, element NO 3, driver 4 of the trailing edge of the input pulses, element OR 5, counter 6 pulses, delay elements 7 and 8, element AND 9, decoder 10 i states, element And 11 zero states, elements AND 12 of the i-th state, while the input of the pulse selector 1 is connected to the input bus and to the input of the former 4, and the output through the element HE 3 to the second input of the element 9, the third input of which is connected to the output of the former 4 , with the input of the element 7 delay, with the first input tr gage 2, with the first inputs of elements And 12, the second inputs of which are connected to the outputs of the decoder 10, the inputs of which are connected to the outputs of the counter 6 pulses, with the second input of the element 11, the first input of which is connected to the output zero of the decoder 10, and the third input through the delay element 8 to the output of the trigger 2, the first input element And 9, the output of which is connected to the counting input of the pulse counter, the second input of the trigger 2 is connected to the reset bus and the first input of the element OR 5, the output of which is connected to the reset input of the counter 6 pulses,second input - to the output of the delay element 7.

The device works as follows.

Previously, a pulse is applied to the reset bus, setting the pulse counter 6 and the trigger 2 in the zero state. In this case, the triggering potential of the element I 9 comes from the trigger output. At the outputs of the selector 1 of pulses and the elements 9, 11, 12 there are logical zeros. The input pulse sequence is fed to the inputs of the selector 1 and the formers 4. With the arrival of the first pulse of a given duration of the selector 1, it generates a selection pulse that flips trigger 2, from the output of which the resolving potential arrives at the first input of the And 9 element and delays through the delay element 8 to the third the input element And 11. The same selection pulse is inverted by the element NOT 3 and fed to the second input of the element 9. It is forbidden for the duration of its action to pass the pulse of the falling front of the selected impulse and from the output of the imaging unit 4, through the element And 9. In this case, the state of the counter 6 remains unchanged — zero, and from the zero output of the decoder 10, the resolving potential is fed to the first input of the element And 11.

The circuit after the arrival of the first pulse of a predetermined duration is in the standby mode of the second pulse of a predetermined duration.

If the second pulse of a given duration of a pair comes after the first, then the state of counter 6 does not change, and the selection pulse from the output of the pulse selector 1 passes through the element 11 of the output to the zero state of the device, evidence of the arrival of a pair of adjacent pulses of a given duration, for which the number of intermediate video pulses is 0.

If the second pulse of a given duration does not come after the first, and between them there are 1, 2 or i number of video pulses, the duration of which differs from the specified one, then each of these intermediate video pulses with its falling front, formed by shaper 4, through the AND 9 element acts on the counting the input of the counter 6, which starts counting the number of intermediate video pulses. In this case, successively from the outputs 1, 2, 3, ..., i of the decimator 10, the resolving potentials arrive at the second inputs of the corresponding elements And 12. The process lasts until the arrival of the second impulse of a predetermined pair duration, the selection impulse of which passes through the open the moment is one of the elements AND 12 at the output of the i-ro state of the device, evidence of the arrival of a pair of pulses of a given duration, for which the number of intermediate video pulses is i.

After the arrival of the second pulse of a given duration of the pair, the selection pulse delayed by the delay element 7, through the OR element 5, resets the counter 6

to zero state. As a result, the circuit goes into the standby state of the next combination of pulses of a given duration in the input sequence.

Claims (2)

Invention Formula The selector pairs of pulses of a given duration, containing a trigger, the output of which is connected to the first input of the first element And whose output is connected to the first input of the pulse counter, the outputs of which are connected to the inputs of the descrambler, the output of which is connected to the first input of the second element And, pulse shaper, whose input is connected to the input thickness AND, a delay element, characterized in that, in order to expand the functionality, an element is NOT included, the element OR, an additional element of delay, complement And nye elements, and a selector pulse of predetermined duration. The input of which is connected to the input width, and the output through the element NOT to the second input of the first element I, the third input of which is connected to the output of the pulse former, to the input of the additional delay element, to the first input of the trigger, the second inputs of which connected to the additional outputs of the decoder, with the second input of the second element I, the third input of which is connected via the delay element to the trigger output, the second input of which is connected to the reset thickness and the first input of the element LEE, the second input of which is connected to the output of the additional delay element and an output - to a second input of the pulse counter. five Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2557687/21, cl. H 03 K 5/18, 23.12.77. 2. USSR author's certificate No. 540365, cl. N OZK 5/18, 11.11.75.