SU683028A1 - Apparatus for receiving bipulse signals - Google Patents

Description

The invention relates to telecommunications and can be used in line and station regenerators of communication systems on electrical and optical cables.

A device for receiving biim / ls signals is known, containing in series an input amplifier, a clock generator and an output gating unit, to the other input of which the output of integrator 1 is connected.

However, the known device has low noise immunity.

The purpose of the invention is to improve noise immunity.

For this, in the device for receiving bi-pulse signals containing a serially connected input amplifier, a clock generator and an output gating unit, to another input of which the integrator output is connected, a modulo two is connected to the integrator's inputs and another input is connected to another input the output of the clock pulse generator, the modulo two adder contains an input element NOT whose outputs are connected to the first inputs of the output elements And the inputs of which are connected and are the other input of the sum; matora modulo two.

FIG. 1 shows the functional electrical circuit of the device; in fig. 2 - time diagrams that show his work.

The device for receiving bi-pulse signals contains a serially connected input amplifier /, a generator of 2 clock pulses and an output gating unit 3, to another input of which the output of integrator 4 is connected, as well as connected between the output of input amplifier / and input of integrator 4 modulator 5 modulo 5, the other input of which is connected to an additional output of the generator 2 clock pulses, and the adder 5 modulo lu two contains an input element NOT 6. whose outputs are connected to the first inputs of the output elements 11 7 and 5, the second inputs of which are connected and are another input of the adder 5 modulo two (Fig. 1).

The device works as follows.

The amplified bi-pulse signal (Fig. 2o) coming from the communication line is fed to the input element HE 6 of the adder 5 modulo two. Modulo two output elements And 7 and 8 of the adder 5 also supply the reference oscillation (Fig. 26) from the generator 2 clocks. The signals from the outputs of the And 7 and 5 elements (Figs. 2c and 2d) are fed to the integrator 4.

From the output of the integrator 4, the voltage (Fig. 2 (and 2e)) is fed to the output unit 3 of the strobe: Vani, which also receives short pulses (Fig. 2z and 2m) from the clock generator 2. The gating unit 3 decides on reception "1 or" About the transmitted information (Fig. 2 / s).

By turning on modulo-2 adder 5, the device determines the cross-correlation function of the input and reference signals, thus providing potential noise immunity.

Formula and 3 optics

I. A device for receiving b pulse signals, containing successively connected input amplifier, generator

four

clock pulses and the output gating unit, to the other INPUT of which is connected the integrator's output, different heme, that, in order to increase noise immunity, there is a modulo-two adder connected to the other input, which is connected to the additional output of the clock generator And the multiplexer.

2. The device according to c. I, characterized in that the modulo two adder contains an input element NOT, the outputs of which are connected to the first inputs of the output elements AND, the second inputs of which are connected and are another input of the modulo two.

The source of information taken into account when examining:

1. USSR author's certificate L 253115, cl. H 04 L 1/10, 1968.

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