Automatic frequency control system for single sideband signal re

Details Automatic frequency control system for single sideband signal re Automatic frequency control system for single sideband signal re

1978-03-16

1980-06-03

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Carrier and single sideband

455263, H04B 116

Patent

active

042064104

ABSTRACT:
A single sideband receiver having a demodulator or mixer for carrier frequency demodulation in response to the output of a controllable variable frequency oscillator and an intermediate frequency demodulator for providing a demodulated signal is provided with an automatic frequency control system comprising a low pass filter for separating a low frequency portion from the demodulated signal a discriminator for detecting the level of the low frequency portion with respect to a predetermined level, and a circuit for controlling the frequency of the variable frequency oscillator in response to the detected relationship between the low frequency portion and the predetermined level.

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patent: 3969675 (1976-07-01), Gosling
patent: 3980968 (1976-09-01), Ma
patent: 4047111 (1977-09-01), Barr

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