SU884078A1 - Device for discriminating control voltage of automatic amplification control of phase-difference manipulation signal receiver - Google Patents

Description

38 1 (Fig. 26) with characteristic nodes and antinodes, as a result of the frequency band narrowing of the signal by the band-pass filter 1. After the output signal of the band-pass filter 1 is detected by the envelope detector 2, a signal is formed (fig. 2c), in the spectrum of which there is a strongly pronounced component clock frequency, and other spectral components, except the zero frequency, are largely suppressed. This allows filtering a clock component with the indicated component (fig. 2d), the amplitude of which corresponds to the level of the input phase-shift keyed signal. After detecting the output signal of the filter 3 clock frequency by the detector 4 and smoothing the filter 5 hours, the voltage is separated direct current (Fig. 2d), the value of which corresponds to the level of the input signal with phase-difference manipulation. The presence of narrow-band filtering in the device ensures the selection of the voltage of the clock frequency that is cleared of interference, which leads to an increase in

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Claims (1)

fff3L / resistance immunity of the device for leveling the control voltage of the AGC of the receiver of signals with phase difference anipulation. Apparatus for isolating a control voltage of an automatic gain control of a receiver of signals with phase difference manipulation, comprising a band-pass filter and a series-connected detector and a low-pass filter, characterized in that, in order to increase noise immunity, between the output of the band-pass filter and the detector input are connected in series envelope detector and clock filter. Sources of information taken into account during the examination 1. V. Gurov, G. A. Emelnov, N. N. Etrukhin. E. V. Basilevich. The Basics of Data Transmission via Wired Communication Channels, M., Svyi, 1964 , with. 267-268, fig. 9.2. tf f