Double superheterodyne multichannel receiver with a phase-locked

Details Double superheterodyne multichannel receiver with a phase-locked Double superheterodyne multichannel receiver with a phase-locked

1975-10-23

1977-05-31

Safourek, Benedict V.

325 25, 325421, 325433, H04B 140

Patent

active

040272427

ABSTRACT:
A double superheterodyne receiver having a single local oscillator which supplies a signal of a predetermined frequency to a second frequency converter or mixer, where a second intermediate frequency signal is produced for final detection. The local oscillator signal is also supplied via a frequency divider to a phase-locked loop frequency synthesizer as a reference frequency signal. The frequency synthesizer supplies to a first frequency converter or mixer a signal with a frequency selected in accordance with the incoming signal frequency to produce a first intermediate frequency signal, which is subsequently combined with the local oscillator signal in the second frequency converter to provide the second intermediate frequency signal. The invention is disclosed as adapted for a multichannel transceiver.

REFERENCES:
patent: 3054057 (1962-09-01), Bettin et al.
patent: 3409836 (1968-11-01), Wallett
patent: 3641434 (1972-02-01), Yates et al.
patent: 3805192 (1974-04-01), Ocnaschek et al.
patent: 3835384 (1974-09-01), Liff

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