Fully integrating resistive array electronic multiplexor

Details Fully integrating resistive array electronic multiplexor Fully integrating resistive array electronic multiplexor

1996-04-10

1998-05-05

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

H01L 3109

Patent

active

057478058

ABSTRACT:
A sensor circuit and method for detecting the current output by one or more resistive detectors by connecting a respective integrating capacitor and a respective switch connected to each detector. Each detector charges the respective integrating capacitor until the switch allows the stored charge in the integrating capacitor to be transferred to the feedback capacitor of a shared operational amplifier which converts the stored charge to a voltage. In this way, current, not voltage is multiplexed and each sensor can be operated, that is, collect charge, virtually all the time. Thus, fewer components are required to monitor a large number of resistive detectors with little or no degradation in the signal to noise ratio.

REFERENCES:
patent: 4403148 (1983-09-01), Coon et al.
patent: 4780612 (1988-10-01), Klatt
patent: 5126552 (1992-06-01), Hayes, Jr.
patent: 5185519 (1993-02-01), Hayes, Jr.
patent: 5442176 (1995-08-01), Eckel, Jr. et al.
patent: 5489776 (1996-02-01), Lung

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