29 July 2004 Digital CMOS interface circuit for current and capacitance sensing
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Abstract
A CMOS digital interface chip has been designed and implemented in standard 1.5 μm n-well CMOS technology for detection of current and capacitance variations across a sensing element. An on-chip digitally variable sensor element simulating current and capacitance is monolithically integrated with the readout circuitry. The chip gives an 8-bit digital output and can detect a minimum current and capacitance up to 150 μA and 2.5 fF, respectively.
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Ashok Srivastava, Ashok Srivastava, } "Digital CMOS interface circuit for current and capacitance sensing", Proc. SPIE 5389, Smart Structures and Materials 2004: Smart Electronics, MEMS, BioMEMS, and Nanotechnology, (29 July 2004); doi: 10.1117/12.540114; https://doi.org/10.1117/12.540114
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