Volume controller

Details Volume controller Volume controller

1994-12-28

1998-06-02

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Including amplitude or volume control

381107, H03G 300

Patent

active

057613214

ABSTRACT:
A volume controlire include a volume regulating circuit having an input terminal connected to an audio signal source and a control terminal to which a volume regulating voltage is supplied. a circuit for supplying parallel data in multiple bits. a Df/A conversion circuit having including multiple current circuits formed in parallel corresponding to every bit of the parallel data, for ON/OFF controlling the current circuits according to respective bit data and for supplying total sun current flowing through these current circuits, a control circuit for controlling output current from the D/A conversion circuit to non-linear current by switching current volumes of respective current circuits corresponding to the most significant bit data out of the parallel data, and a circuit for generating the volume regulating voltage by converting the output current from the D/A conversion circuit into voltage.

REFERENCES:
patent: 3796945 (1974-03-01), Feldman

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