Supervised input converter

Details Supervised input converter Supervised input converter

2006-12-26

2006-12-26

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

Reexamination Certificate

active

07154425

ABSTRACT:
A multiplexer selects an input signal from one of plural sensors. An A/D converter converts the selected input signal to a digital input value. A processor then determines, based on the digital input value, an output resistance to which the resistance of the selected sensor is to be translated. Finally, the processor controls a digital potentiometer corresponding to the selected sensor to the determined output resistance. In one embodiment, a conditioning circuit adjusts the gain of the input signal according to calibration data, effectively performing at least a part of the translation in the analog domain.

REFERENCES:
patent: 3387282 (1968-06-01), Jacques
patent: 4408157 (1983-10-01), Beaubien
patent: 6312061 (2001-11-01), Schliebe et al.
patent: 6320451 (2001-11-01), Harvey et al.
Chuck Wojslaw, XICOR Application Note AN124, Feb. 2000, found at www.xicor.com/pdf—files/an124.pdf.
XICOR X9250, “Quad Digitally Controlled Potentiometers (XDCP)”, Jan. 31, 2003, found at www.xicor.com/pdf—files/x9250.pdf.

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