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A closed-loop capacitance-to-frequency converter for single-element and differential capacitive sensors

Author
Areekath, L.; George, B.; Reverter, F.
Type of activity
Journal article
Journal
IEEE transactions on instrumentation and measurement
Date of publication
2020-11-01
Volume
69
Number
9107241
First page
8773
Last page
8782
DOI
10.1109/TIM.2020.2999737
Repository
http://hdl.handle.net/2117/341977 Open in new window
URL
https://ieeexplore.ieee.org/document/9107241 Open in new window
Abstract
A novel closed-loop switched-capacitor(SC) capacitance-to-frequency converter (CFC) is presentedin this paper. The proposed CFC is capable of measuring from either a single-element or a differential capacitive sensor, providing ratio and ratio-metric outputs,respectively.Most of the existing auto-balancing schemesfor capacitive sensors use theclosed-loop approach but requireprecise sinusoidal AC excitation andprovidean analog outputthatissensitive to parasitic capacit...
Citation
Areekath, L.; George, B.; Reverter, F. A closed-loop capacitance-to-frequency converter for single-element and differential capacitive sensors. "IEEE transactions on instrumentation and measurement", 1 Novembre 2020, vol. 69, núm. 9107241, p. 8773-8782.
Keywords
Capacitance-to-digital converter, Capacitance-to-frequency converter, Capacitive sensor, Closed-loop, Differential capacitive sensors, Interface circuit, Single-element capacitive sensor, Switched-capacitor
Group of research
e-CAT - Electronic Circuits and Transducers

Participants