Offset compensation for differential charge‐based capacitance measurement
Copyright policy )Offset compensation for differential charge‐based capacitance measurement
SummaryThis 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.
- University of Catania Italy
CBCM, capacitive sensors, mismatch com-pensation, capacitance measurement, charge based capacitance measurement, mismatch compensation, charge-based capacitance measurement
CBCM, capacitive sensors, mismatch com-pensation, capacitance measurement, charge based capacitance measurement, mismatch compensation, charge-based capacitance measurement
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