Pulsating noise removal device

Details Pulsating noise removal device Pulsating noise removal device

1988-01-19

1989-08-29

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328167, 328192, 328162, 307542, 307520, 330109, H03K 500, H03K 306, H04B 110

Patent

active

048620971

ABSTRACT:
A pulsating noise removal device detects a pulsating noise, controls a gate circuit for selectively permitting an audio signal to pass through in response to the detection, and removes pulsating noises from the audio signal. The device particularly includes filter circuits for extracting pulsating noises and signal components from the audio signal, respectively, and includes automatic gain control circuits responsive to respective output signals of the filter circuits to respectively control the gain of an amplifier circuit for detecting pulsating noises.

REFERENCES:
patent: 4216430 (1980-08-01), Amazawa et al.
patent: 4256975 (1981-03-01), Fukushima et al.
patent: 4612662 (1986-09-01), Kuwajima et al.
patent: 4701715 (1987-10-01), Amazawa et al.

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