Nonlinearly variable gain apparatus

Details Nonlinearly variable gain apparatus Nonlinearly variable gain apparatus

1978-01-03

1979-04-24

Dahl, Lawrence J.

Amplifiers

Signal feedback

Potentiometer common to signal and feedback path

330 69, 330103, H03F 136

Patent

active

041514785

ABSTRACT:
A nonlinearly variable gain circuit is utilized to produce an inverted logarithmic S curve of gain versus potentiometer rotation while using a linear resistance taper potentiometer. An operational amplifier feedback circuit uses the linear potentiometer and a resistance network in combination.

REFERENCES:
patent: 3448289 (1969-06-01), Harris
patent: 3506847 (1970-04-01), Schow

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