Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-03-15
1978-08-15
Martin, John C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
325402, 325410, 325456, 325478, 358165, H04B 116
Patent
active
041076141
ABSTRACT:
A muting control circuit for an FM receiver provides rapid on-off response during channel selection or tuning, and rapid on but delayed off response during listening, whereby annoying muting circuit switching is reduced. The delay is implemented by rapidly charging a capacitor when the muting is switched on, and then allowing the relatively slower discharge of the capacitor to prolong the muting operation after the control signal therefore is terminated.
REFERENCES:
patent: 2546401 (1951-03-01), Nicholson, Jr.
patent: 2560313 (1951-07-01), Tellier
patent: 3665320 (1972-05-01), Ohsawa et al.
patent: 3724916 (1973-10-01), Merrell
patent: 3806818 (1974-04-01), Uchiyama
patent: 3916321 (1975-10-01), Morse
Chin Tommy P.
Martin John C.
Pioneer Electronic Corporation
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