Noise suppressor system

Details Noise suppressor system Noise suppressor system

1976-07-26

1979-01-23

Claffy, Kathleen H.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330155, H03G 334

Patent

active

041355903

ABSTRACT:
A noise suppressor system uses a set of parallel bandpass filters to transform an input signal into a plurality of spectral adjacent band signals. Each band signal may then be substantially attenuated (squelched) by an attenuation-control circuit when it drops below a predetermined noise threshold. All band signals are then summed to reform essentially the original but noise-suppressed signal. Features of the invention include essentially linear control-attenuation circuitry, and ganged input-output manual level controls for dynamic range matching at constant overall gain.

REFERENCES:
patent: 2606972 (1952-08-01), Scott
patent: 3180936 (1965-04-01), Schroeder
patent: 3213372 (1965-10-01), Kurvits
patent: 3403224 (1968-09-01), Schroeder
patent: 3539725 (1970-11-01), Hellwarth
patent: 3678416 (1972-02-01), Burwen
patent: 4000369 (1976-12-01), Paul

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