FM receiver having transmitting function

Details FM receiver having transmitting function FM receiver having transmitting function

1974-07-08

1976-02-03

Safourek, Benedict V.

325 21, 325346, H04B 144

Patent

active

039367460

ABSTRACT:
An FM receiver having a signal transmission capability includes an FM signal receiving circuit including a local oscillator and an FM detector for receiving an FM signal and for demodulating the received signal to derive an audio signal therefrom. A frequency controller is responsive to a control signal for controlling the oscillating frequency of the local oscillator of the FM signal receiving circuit. A portion of the signal produced by the FM detector as well as a signal to be transmitted by the FM receiver are supplied to a first switch, the first switch being adapted to apply either of the signals supplied thereto to the frequency controller as a control signal therefor. A second switch is selectively operable to turn the control signal on or off.

REFERENCES:
patent: 2379395 (1945-06-01), Ziegler et al.
patent: 2846572 (1958-08-01), Elliott
patent: 2972047 (1961-02-01), Werner et al.
patent: 2991353 (1961-07-01), Barnes
patent: 3219931 (1965-11-01), Lennon et al.
patent: 3509462 (1970-04-01), Ertman

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