Logarithmic taper resistor with zero crossing changes

Details Logarithmic taper resistor with zero crossing changes Logarithmic taper resistor with zero crossing changes

1997-03-11

1999-07-13

Hecker, Stuart N.

Electricity: power supply or regulation systems

External or operator controlled

Using an impedance as the final control device

338 89, G05B 2402

Patent

active

059231599

ABSTRACT:
A digital potentiometer capable of being connected directly to an electronic switch is disclosed. The digital potentiometer for example may utilize a 64 step resistor array, which would then have 64 steps. Each of the steps have precise values so as to accurately attenuate a signal in logarithmic steps. The logarithmic resistor is connected to a gate device which in turn has a voltage source connected to it designed to provide the threshold or turn-on voltage for the device for each of the 64 steps and wiper points of the resistor array.

REFERENCES:
patent: 4912394 (1990-03-01), Sugimoto et al.
patent: 4978904 (1990-12-01), Fitzpatrick et al.
patent: 5216355 (1993-06-01), Terada et al.
patent: 5218225 (1993-06-01), Zanders
patent: 5339021 (1994-08-01), Thomson
patent: 5408205 (1995-04-01), Blacka

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