Compander circuit

Details Compander circuit Compander circuit

1994-10-07

1997-05-27

Isen, Forester W.

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

333 14, H03G 700

Patent

active

056339399

ABSTRACT:
A compander circuit includes first and second volume controllers, a comparator, a counter and a control part. The comparator compares a compared voltage with a rectified and smoothed signal of an input signal of the compander circuit or an output signal of the first volume controller receiving the input signal, the compared voltage being an output signal of the second volume controller. The counter executes a count operation on an output signal of the comparator in synchronism with a clock signal and controls gains of the first and second volume controllers on the basis of a counter value of the counter. The control part controls a frequency of the clock signal applied to the counter by a predetermined control signal.

REFERENCES:
patent: 4691377 (1987-09-01), Yoshihara et al.
patent: 4707840 (1987-11-01), Nakayama
patent: 5134722 (1992-07-01), Emslie et al.
Lancaster, TTL Cookbook, pp. 243, 244, 1974.
Chamberlin, Musical Applications of Microprocessors, pp. 344, 343.

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