Patent
1976-09-29
1978-04-18
Griffin, Robert L.
325478, H04B 110
Patent
active
040853705
ABSTRACT:
FM-radio receiver having an audio amplifier stage, provided with switching means, and a squelch circuit which is coupled to the output of the receiver demodulator, this squelch circuit comprising two circuits which are constructed in such a manner that one circuit produces at an early stage an output signal when co-channel interference occurs whereas the other circuit produces an output signal which controls said switching means and which occurs only at an impermissible signal
oise ratio and/or an impermissible degree of co-channel interference.
REFERENCES:
patent: 3090918 (1963-05-01), Arguimbau
patent: 3188571 (1965-06-01), Michael
patent: 3934206 (1976-01-01), Holecek
"Active Filters : Lumped, Distributed, Integrated, Digital & Parametric", Lawrence P. Huelsman, 1970, McGraw-Hill, pp. 119-127.
Noordanus Johannes
van der Poel Johannes
Bookbinder Marc E.
Griffin Robert L.
Steckler Henry I.
Trifari Frank R.
U.S. Philips Corporation
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