Tuning control system of radio receiver

Details Tuning control system of radio receiver Tuning control system of radio receiver

1977-12-14

1980-06-10

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455184, 455186, H04B 134

Patent

active

042075319

ABSTRACT:
A tuning control system of a radio receiver comprises a tuning voltage supply circuit which sweeps the received frequency by applying a variable control voltage to a variable reactance element of the tuning circuit and also stops the generation of the control voltage by means of a signal which is generated when a broadcasting signal is received. A memory for preset selection stores a counted value based on the received frequency signal and outputs this stored calculation value as a value corresponding to the desired broadcasting frequency. A digital comparator circuit compares the counted value based on the random receiving frequency signal and the counted output from the memory and generates a selection command signal for the tuning voltage circuit.

REFERENCES:
patent: 3845394 (1974-10-01), Hamada
patent: 3940702 (1976-02-01), Yoshimura et al.
patent: 3965336 (1976-06-01), Grohmann
patent: 3971992 (1976-07-01), Saikaishi et al.
patent: 3988681 (1976-10-01), Schurmann

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