Interferences reduction for use in an FM radio receiver

Details Interferences reduction for use in an FM radio receiver Interferences reduction for use in an FM radio receiver

1978-06-16

1980-03-04

Olms, Douglas W.

H04H 500

Patent

active

041918509

ABSTRACT:
Information signals, 19 KHz stereo pilot signals and interference signals are received at an antenna and then applied to a low-pass filter and a high-pass filter. The interference signals derived from the high-pass filter control a gate which is disposed in a circuit path including the low-pass filter, a subcarrier generator and an FM multiplexer for the interference reduction purposes. A trap filter is provided between the antenna and the FM multiplexer for arresting the 19 KHz stereo pilot signals, while the signals derived from the low-pass filter are introduced into the above mentioned circuit path.

REFERENCES:
patent: 3739285 (1973-06-01), Hepp
patent: 3919482 (1975-11-01), Hamada
patent: 4066845 (1978-01-01), Kishi

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