Automatic noise eliminating device for an FM receiver

Details Automatic noise eliminating device for an FM receiver Automatic noise eliminating device for an FM receiver

1980-09-16

1983-04-05

Hickey, R. J.

179 1GD, 179 1P, H04H 500

Patent

active

043792073

ABSTRACT:
In an FM receiver having cutoff circuits for cutting off higher frequency signal components of an audio signal, and for reducing stereo separation between channels, there is provided a multipath detector for detecting an amplitude modulated FM intermediate frequency signal and outputting a control signal depending on the magnitude of the amplitude modulated FM intermediate frequency signal into the cutoff circuit so that the high frequency noise due to multipath transmission can be eliminated. The invention is particularly suited to use with a stereo FM receiver mounted in an automotive vehicle, but may equally be applied to a mono receiver, or a receiver in any location.

REFERENCES:
patent: 3952161 (1976-04-01), Gilbert et al.
patent: 4029906 (1977-06-01), Takahashi
patent: 4037057 (1977-07-01), Ogita et al.

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