Voltage and resistance synthesizer using pulse width modulation

Details Voltage and resistance synthesizer using pulse width modulation Voltage and resistance synthesizer using pulse width modulation

1994-07-14

1995-03-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

323314, 324601, H02J 500

Patent

active

054020824

ABSTRACT:
A voltage and resistance synthesizer includes a pulse width modulator (PWM) for synthesizing voltage and resistance values at a pair of terminals. A selector switch selects between a resistance synthesis mode, in which resistance values are synthesized from a single reference resistor, and a voltage synthesis mode, in which voltage values are synthesized from a single reference voltage. The pulse width modulator permits digital control words to be received which govern the synthesized value with 16 bit resolution. A low pass filter blocks the switching frequency components and provides a d.c. voltage which is the product of the duty cycle and the reference value.

REFERENCES:
patent: 3947675 (1976-03-01), Mayn
patent: 4375625 (1983-03-01), Lee
patent: 4716398 (1987-12-01), Eccleston et al.
patent: 5045712 (1991-09-01), Baggenstoss
patent: 5250774 (1993-10-01), Lee

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