SU1418787A2 - Signal transceiver - Google Patents

Abstract

The invention relates to computing and can be applied to organize the exchange between blocks of digital computing systems. In order to increase reliability and speed, an additional amplifier was introduced at the receiving side for transmitting and receiving signals and, in negative feedback, a high-frequency clock generator and the output of the selection element — the prohibition element — input of the selection element. 1 il.

Description

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The invention relates to a computational liexHHKe, can be applied to organize the exchange between blocks of digital computing systems and is an improvement of the technical solution by the author. St. No. 862167.

The aim of the invention is to increase reliability and speed. : The drawing shows a structural scheme of the device for transmitting and receiving signals:

I The proposed device contains on the () side, to its side the master oscillators li-1l, pulse formers 2i-2, amplifier 3, link 4 and additional amplifier 5, on the receiving side the p1-6p elements of the signal extraction, driver J7 pulses, element OR 8, trigger 9, prohibition lOi -10 „elements, threshold elements jweHTbi 111 - llr, elements AND 12i -12„ and clock generator 13.

1 The device operates as follows. I Shifters 2i-2 "when signals are received at information inputs n generate pulse signals of a certain duration, and the duration of the pulses produced by the hp-m former is calculated by the formula

t - T

Im af

L / (|, 5

where T is the duration of the base pulse, is equal to the half-period of the first mode of resonant oscillations of the signal extraction element, made on the basis of a piezoelectric resonator,

w - died shaper; rRo 5 is the bandwidth of element 6 under pulsed excitation at a level of 0.5.

The pulse duration is set by master oscillators U-1. Thus, the encoding of the transmitted information symbols is carried out by pulse signals of different duration. From the formers 2i-2, signals are sent to the amplifier 3 and then to the communication line 4. Thereafter, a signal is applied to the amplifier 5, which serves for additional amplification. The selection of pulses according to their duration is carried out by the elements 6i-Qn of the signal extraction. The voltage amplitude at their outputs is maximal when the input pulse duration is equal to half the period of resonance oscillations of the piezoelectric resonator.

The voltage level corresponding to the level of the useful signal at the outputs of elements 6, -6 ' is fixed by the corresponding threshold elements 11, -11 '. When pulsed excitation elements 6 -BP, made on the basis of piezoelectric

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five

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five

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resonators, parasitic oscillations occur in them, following, and not following the useful signal. Consequently, the limiting frequency of signal transmission in the device in question is limited by the damping time of parasitic oscillations in resonators 6-6,. Suppression of parasitic oscillations in the device is carried out by introducing negative feedback through the circuit: output of the element 6 | -6p - information input of the element lOi - Prohibition Yul - output of the prohibition element, element And I2i-12 "- second input of the element 6; -J5n - The phase shift of the input signals by 180, necessary for negative feedback, is provided by using piezoelectric resonators as 6i-6l elements.

For the time of passage through the elements of the useful signal, the prohibition elements lOi - lOn are closed, and the threshold elements 111-1 "are open. To ensure this condition, the shaper 7, the element OR 8 and the trigger 9 are inserted. The shaper 7 forms the flashing signal of the trigger 9 via the leading edge of the incoming signal from link 4 through the amplifier 5, which leads to the opening of the threshold elements 111 - Pl and closing lOi-Yul ban. Filtered signals from the outputs of elements 6i-6p are fed to the inputs of the element OR 8. The falling edge of the filtered useful signals that passed to the output of the element OR 8, flips the trigger into one state, which causes the opening of the elements lOi - lO, prohibition (opening a negative negative circuit) connection), the elements of lli-n are closed. The signal from element 10i-Yul prohibition enters the first input of element And 12, opens it, the high-frequency signal from the clock generator 13 constantly arrives at the second input of element And 12, and the modulated signal is observed at the output of element 12. Improving the efficiency of damping of shock oscillations is provided by performing a feedback circuit in the form of an element 10i-Jup prohibition - element I 12i-12a - tunable threshold filter 6j-6 of the high-frequency component from the clock generator 13 (f 350-500 MHz), causing the residual vector surface polarization, with the shock oscillations quenched in half a period less than -dT, which increases the reliability of information transfer.

Claims (1)

Invention Formula A device for transmitting and receiving signals on Aut. St. No. 862167, characterized in that, in order to increase reliability and speed, an additional amplifier is introduced into it on the receiving side. And elements and a clock generator, an additional amplifier, input and output connected respectively between the communication line and the first inputs of the selection elements of the signal, between the output of the prohibition element and the second input of the selection element of the signal are connected respectively to the first input and output of the same And element whose second input is connected with the output of the clock generator.