Channel selector having a plurality of tuning systems

Details Channel selector having a plurality of tuning systems Channel selector having a plurality of tuning systems

1980-01-07

1982-11-30

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

331 2, 331 14, 455141, 455165, 455183, H03L 722, H04B 126

Patent

active

043619061

ABSTRACT:
A channel selector characterized in that a plurality of receivers capable of simultaneously performing a receiving operation have a main part of a phase-locked loop frequency synthesizer connected in common thereto, the frequency synthesizer having a programmable frequency divider, a phase comparator, a reference oscillator and a reference frequency divider. The frequency synthesizer is controlled so that a local oscillation frequency corresponding to a determined frequency close to a broadcast signal of a desired receiving channel is synthesized, and one of a plurality of search tuning systems searches and tunes the broadcast signal from the local oscillation frequency.

REFERENCES:
patent: 2620437 (1952-12-01), Zappacosta
patent: 2626315 (1953-01-01), Farr
patent: 2666853 (1954-01-01), O'Brien
patent: 3745467 (1973-07-01), Lundquist et al.
patent: 3927384 (1975-12-01), Jezo
patent: 4123724 (1978-10-01), Das et al.
patent: 4317228 (1982-02-01), Hendrickson

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