This paper presents a fully integrated differential charge-based capacitance measurement (CBCM) circuit designed to detect attoFarads capacitive variations to find airborne particulate matter (PM). This paper presents a novel method for compensating the output offset of the CBCM electronic front-end in the range of 3.1–3.4 V through the trimming of the bulk voltage of key transistors of the circuit topology. Experimental results on prototypes implemented using a 130-nm CMOS technology and driven by a 100-MHz clock confirm the validity of the proposed approach.
Offset compensation for differential charge-based capacitance measurement
Cassalini M.
Primo
;Ferlito U.;Grasso A. D.;
2024-01-01
Abstract
This paper presents a fully integrated differential charge-based capacitance measurement (CBCM) circuit designed to detect attoFarads capacitive variations to find airborne particulate matter (PM). This paper presents a novel method for compensating the output offset of the CBCM electronic front-end in the range of 3.1–3.4 V through the trimming of the bulk voltage of key transistors of the circuit topology. Experimental results on prototypes implemented using a 130-nm CMOS technology and driven by a 100-MHz clock confirm the validity of the proposed approach.File in questo prodotto:
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