SU1039021A2 - Device for reproducing square pulses - Google Patents

Abstract

DEVICE REPRODUCTION OF RECTANGULAR PULSES by author. St. ; 702503j characterized in that, in order to improve noise immunity, additionally the second input of the AND element is connected to an additional rarescale input of the memory trigger, the first input of the OR element is connected to the additional input of the first group of inputs of the switch, an additional output of the second decoder to the additional input of the second group of inputs of the switch , and the output element is NOT - with an additional input of the third group of inputs of the switch. g (L с со: о о tsD

Description

The invention relates to a pulse technique and can be used in telemechanics, radar technology, communication technology.

According to the main author. St. No. 702503, a rectangular pulse reproduction apparatus comprising a first and second pulse counters, a pulse generator, a control trigger, a NOT element, an AND element, a memory trigger, an OR element, a first and U second pulse decoder and a switch is known.

The device provides restoration of the distorted signal in the communication line to the nominal value for the duration of £ 1].

However, the known device for reproducing rectangular pulses has insufficient noise immunity when exposed to short-term impulse noise arising in the communication lines, the duration of which is less than half the minimum duration of the reproduced signal pulses.

. The purpose of the invention is to increase noise immunity.

This goal is achieved by the fact that in the device for reproducing rectangular pulses containing two pulse counters, the input of the first of which is connected to the output of the pulse generator, the control trigger, the element NOT and the element AND, the inputs of which are connected to the input of the device, the memory trigger, the output of which is connected to the output of the device, and an OR element, the first and second * pulse decoders, a switch, the first group of inputs of which is connected to the first group of outputs <the first pulse decoder, the second group of inputs - with outputs the second pulse decoder, the third with the output of the element NOT, and the output with the installation inputs of both pulse counters, with zero inputs of the memory trigger and the control trigger, the outputs of the first pulse counter are connected to the inputs of the first pulse decoder, the outputs of the second group of which are connected through the OR element and the AND element to the input of the second pulse counter, the outputs of which are connected to the inputs of the second pulse decoder, and one of the outputs of the first pulse decoder is connected to a single input of the memory trigger, and the pulse generator stroke is connected to the output of the control trigger, additionally VTB> swarm input of the AND element is connected to the enable input of the memory trigger (the first input of the OR element is connected to the additional input of the first group of inputs of the switch, the additional output of the second decoder with the additional input of the second group of inputs of the switch, and the output of the element is NOT with an additional input of the third group of inputs of the switch.

The drawing shows a block diagram of the proposed device for reproducing rectangular pulses.

The rectangular pulse reproduction apparatus comprises a first pulse counter 1, a second pulse counter 2, a pulse generator 3, a control trigger 4, a HE element 5, an AND 6 element, a memory trigger 7, an OR element 8, a first pulse decoder 9, a second pulse decoder 10, a switch eleven.

The device for reproducing rectangular pulses operates as follows.

When a short-term pulse of interference is received at the input of the device, the duration of which is less than half the minimum duration of the reproduced pulses, i.e.

t _n <after a period of time, the first signal appears at the output of the decoder 9. However, this signal will not set the trigger 7 memory in a single state and will not pass to the counter 2, because by this time at the enable input of the trigger 7 memory and the second input element And 6 there will already be no interference pulse. The decoder 10 decrypts the zero state of the counter 2 and prepares the input of the switch 11 to pass the first signal from the output of the decoder 9. Since the interference pulse is no longer at the output of the device, the element NOT 5 allows the passage of the first signal through the switch 11 and it resets; the control state resets trigger 4 and counter 1, thereby preparing the device for receiving a pulse of a signal following the interference pulse. At the output of the device, the interference pulse is not reproduced, since the memory trigger 7 was not set to state 1 by the interference pulse.

In the case when the signal pulse acts on the input of the device, the first signal from the output of the decoder 9 does not pass through the switch; since in this case this is prevented through the element NOT 5 by the pulse of the signal.

ВНИИПИ Order 6241/59 Circulation 936 Subscription

Branch of PPP Patent, Uzhhorod, st. Project, 4

Claims (1)

DEVICE FOR PLAYING RECTANGULAR PULSES by ed. St. : No. 702503, characterized in that, in order to increase the noise immunity, the second input of the AND element is additionally connected to the additional enable input of the memory trigger, the first input of the OR element is connected to the additional input of the first group of switch inputs, the additional output of the second decoder with the additional input of the second groups of inputs of the switch, and the output of the element is NOT with an additional input of the third group of inputs of the switch.