Channel selection apparatus tunable to destined frequency in sho

Details Channel selection apparatus tunable to destined frequency in sho Channel selection apparatus tunable to destined frequency in sho

1978-10-13

1981-05-26

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455161, 455255, H04B 116

Patent

active

042702194

ABSTRACT:
A channel selection apparatus comprises a sweep control voltage generator driven by a circuit for sweeping the local oscillation signal frequency in an electronic tuner. The local oscillation signal frequency sweeping circuit includes an arrangement for increasing the rate of sweeping the local oscillation signal frequency only when the latter is being changed not in the vicinity of a destined frequency. The apparatus may further comprise another arrangement for preventing an eventual excessive sweeping beyond the destined frequency.

REFERENCES:
patent: 3822405 (1974-07-01), Sakamoto
patent: 3846707 (1974-11-01), Sakamoto et al.
patent: 3913020 (1975-10-01), Van Anrooy
patent: 3988681 (1976-10-01), Schurmann
patent: 4004233 (1977-01-01), Sakamoto
patent: 4031491 (1977-06-01), Sakamoto
patent: 4063179 (1977-12-01), Brown

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