SU1543557A1 - Duplex transmission system for discrete information - Google Patents

Abstract

The invention relates to communication technology. The purpose of the invention is to improve the noise immunity. A discrete information duplex system contains at each transceiver station a transmitting amplifier 1 consisting of a signal generator 11, a voltage source 12, an amplifier 13 and an optocoupler 14, a current stabilizer 2, a resistor 3, a receiving amplifier 4, a differential amplifier 5, optocouplers 6 and 7, amplifiers 9 and 10, and a communication line 8. Transceiver stations provide duplex exchange of binary information over a two-wire physical link 8, while the information can be transmitted asynchronously and at arbitrary speeds. The goal is achieved by suppressing crosstalk. 2 Il.

Description

one

(21) 4277881 / 24-09

(22) 04.06.87

(46) 02.15.90. Bul ff 6 (72) E.Yu.Gladkov

(53) 621.396.41 (088.8)

(56) USSR Copyright Certificate No. 564728, cl. H 04 L 5/14, 1974.

(54) DUPLEX TRANSMISSION SYSTEM. DISCRETE INFORMATION

(57) The invention relates to communication technology. The purpose of the invention is to improve the noise immunity. The system of duplex transmission of discrete information contains on each transceiver

station transmit amplifier 1, co. of the signal generator 11, voltage source 12, amplifier 13 and optocoupler 14, current stabilizer 2, resistor 3, receiving amplifier 4, differential amplifier 5, optocouplers 6 and 7, amplifiers 9 and 10, and link 8. Transceiver stations provide duplex exchange of binary information over a two-wire physical communication line 8, and the information can be transmitted asynchronously and at arbitrary speeds. The goal is achieved by suppressing crosstalk. 2 Il.

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15435574

FIELD OF INVENTION FIG. , 1 is a diagonal view and can be used to transmit information over telegraph channels,

The purpose of the invention is to increase interference immunity by suppressing crosstalk.

FIG. 1 shows a structural electrical circuit of the proposed system} in FIG. 2 - time. Diagrams.

 The system of duplex transmission of discrete information contains on each

current frame at the output of the current stabilizer 2.

FIG. 2d is a diagram of the currents given by the transceiver.

by the stations in the communication line provided that the input impedances of the stations are determined by the total resistance of the resistor 3 and the LED of the optron 6 for each station.

FIG. 2e, d and fig. 2i, lm are diagrams of the currents f flowing through the photodiodes of the Transceiver Station, respectively, transmitting j ° PTrons 6 and 7, which are set to signal Amplifier 1, stabilizer 2 currents, currents characterized by similar ezistor 3, receiving amplifier 4,: ferential the amplifier 5, the first second optocoupler 6 and 7, the line 8 of the communication and the first and second amplifiers 9 and 1

The transmitting amplifier forms a signal conditioner 11, a voltage source 12, an amplifier 13 and an optocoupler 14.

The system operates as follows: 25 voltages obtained at the output of the prize, capacitive amplifier 4, copying the in-transmitting station of the modulating current in a two-wire physical, copying the binary sequence amplitude ratios, and the analog subtraction of these 2Q signals at the output of the differential amplifier, a signal is reproduced copying the information supplied to the input of the signal former 11. FIG. 2k, And the plot is represented

the formation binary sequence shown in FIG. 2 & sd, Transceiver stations provide

The information received at the input, the full duplex exchange of the DIary informator 12 of the signal, simultaneously ensures the reception of current parcels coming from the line from the other transceiver station, forming at the output of the receiving amplifiers of the Schmidt trigger a copy of the binary sequence arriving at shaper 11 signal.

FIG. 2a, & is represented as a data over a two-wire physical link, and the information can be transmitted asynchronously and at arbitrary speeds.

Claims (1)

Formula of abbreviations  / A duplex disc information system containing on each As an example of an information binary transceiver station, a transmitting ya sequence coming to the input shaper 11 signal. AT Generally, both sequences Can be transmitted with arbitrary speed and asynchronous. The signal from the output of the signal generator 11, amplified by the amplifier 13, controls the state of the phototransistor of the optocoupler 14. When the amplifier is closed, the amplifier, a resistor, a differential amplifier, the output of which is connected to the input of the receiving amplifier, is different from that 45 in order to increase the noise immunity by suppressing crosstalk, two optocouplers, two amplifiers and a current stabilizer are introduced, the input of which is connected to the first output of the phototransistor, the 12 np source, the gain amplifier, the second core output is disconnected from. The input of the stabilizer is connected to the cathode of the current LED 2 and the current given by the transceiver station is zero in the communication line. When the phototransistor of the optocoupler 14 is open, the voltage from the output of the voltage source 12 is fed to the input of the current stabilizer 2, which sets the current in the communication line and 55 Yes, the second optocoupler, the anode of which is connected to the first output of the resistor, the second output of which is connected to the cathode of the LED of the first optocoupler, the anode of which is connected to the output of the current regulator, while the photodiodes of the first and second optocouplers are connected to the inputs of the first circuit of the optocouplers 6 and 7 and resistor 3, respectively , current frame at the output of the current stabilizer 2. FIG. 2d is a diagram of the currents given by the transceiver. FIG. 2e, d and fig. 2i, lm are diagrams of currents flowing through, respectively, photodiodes ° ptrons 6 and 7, which define signals characterized by similar amplitude ratios, and the inputs of the differential amplifier 5. As a result of analog subtraction of these signals at the output of the differential amplifier, a signal is reproduced that copies the information supplied to the input of the signal generator 11. FIG. 2k, And the plot is represented the formation binary sequence shown in FIG. 2 & sd, Transceiver stations provide a formation over a two-wire physical link, whereby information can be transmitted asynchronously and at arbitrary speeds. Formula of abbreviations )  / A discrete information duplex system containing on each amplifier, resistor, differential amplifier, the output of which is connected to the input of the receiving amplifier, characterized in that, in order to increase the noise immunity by suppressing crosstalk, two optocouplers, two amplifiers and a current stabilizer, whose input is connected to the first output of the transducer, are introduced -, -p the giving amplifier, the second output of which is connected to the cathode of the LED five Yes, the second optocoupler, the anode of which is connected to the first output of the resistor, the second output of which is connected to the cathode of the LED of the first optocoupler, the anode of which is connected to the output of the current regulator, while the photodiodes of the first and second optocouplers are connected to the inputs respectively per515435576 second second amplifiers, the outputs of the first and second differential inputs are connected respectively to ousal student first and second in ousal student