Noise suppressing device in FM receiver

Details Noise suppressing device in FM receiver Noise suppressing device in FM receiver

1980-04-28

1982-04-20

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455266, 455222, 455311, H04B 110

Patent

active

043262970

ABSTRACT:
An FM receiver including a noise suppressing circuit in which the signal from which the noise is detected is taken from a front-end section of the receiver and a correction to the noise is made prior to the detector of the receiver. The noise is suppressed by terminating the received signal upon detection of the presence of noise and holding the level which was present before the noise was detected for a predetermined period of time. By detecting the noise in a signal from the front end of the receiver and by making the correction prior to the detector circuit, only a very short predetermined time period need be used and no complicated pilot signal processing circuit is required.

REFERENCES:
patent: 2969459 (1961-01-01), Hern
patent: 4066845 (1978-01-01), Kishi
patent: 4178552 (1979-12-01), Amazawa et al.

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