Charge pump for digital potentiometers

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

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Details

327544, 327538, 327558, G05F 110

Patent

active

057317364

ABSTRACT:
A voltage bias generating circuit is disclosed which comprises a voltage-controlled charge pump which operates at a high frequency relative to audio frequencies wherein a plurality of low pass filters are used to prevent the introduction of noise and distortion of audio signals being amplified through a digital potentiometer or resistor array.

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Dallas Semiconductor Corporation, System Extension Data Book, "DS1802, Dual Audio Taper Potentiometer with Pushbutton Control," 1994-1995, pp. 217-230 .

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