Sound signal output circuit and method

Details Sound signal output circuit and method Sound signal output circuit and method

1994-08-26

1998-01-06

Coles, Sr., Edward L.

Electrical audio signal processing systems and devices

Including amplitude or volume control

Automatic

381106, H03G 300

Patent

active

057063575

ABSTRACT:
A sound signal output circuit and method which controls the volume every time a new signal source is selected which has a different modulation degree, than the previous signal source and which prevents sound distortion caused by an over-modulated sound signal input. The circuit detects the peak value of the selected sound signal source, stores the detected peak value, compares the stored peak level with the detected peak level, and thereby selects the greater peak level. Next, the circuit applies the selected peak level to a gain control amplifier as a gain control value, so that when the sound signal source having a different modulation degree is selected, the volume can be automatically controlled.

REFERENCES:
patent: 4071695 (1978-01-01), Flanagan et al.
patent: 4940947 (1990-07-01), McCartney et al.
patent: 5165017 (1992-11-01), Eddington et al.
patent: 5369711 (1994-11-01), Williamson, III

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