Muting arrangement of a radio receiver with a phase-locked loop

Details Muting arrangement of a radio receiver with a phase-locked loop Muting arrangement of a radio receiver with a phase-locked loop

1978-12-21

1980-11-04

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455183, 455194, 455212, 331DIG2, 179 1G, H04B 110, H04B 116

Patent

active

042323932

ABSTRACT:
In a muting arrangement of a radio receiver using a phase-locked loop frequency synthesizer as a local osicillator, a detector detects an in-lock or out-of-lock state of the phase-locked loop through an output state of a phase comparator included in a feedback loop of the phase-locked loop frequency synthesizer, and a mute gate provided in a signal transmission path of the receiver is operated to mute an audio output when the phase-locked loop is out of lock. An indicator may be provided for visually indicating that the phase-locked loop is in lock.

REFERENCES:
patent: 3766482 (1973-10-01), Brown, Jr. et al.
patent: 3919482 (1975-11-01), Hamada
patent: 3932821 (1976-01-01), McClaskey
patent: 3939425 (1976-02-01), Toyoshima
patent: 3949305 (1976-04-01), McClaskey et al.
patent: 4035727 (1977-07-01), Ishii
patent: 4087756 (1978-05-01), Rogers, Jr.
patent: 4109283 (1978-08-01), Rast

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