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Title

Design of a CMOS closed-loop system with applications to bio-impedance measurements

AuthorsYúfera, A. ; Rueda, Adoración
KeywordsImpedance measurements
Electrical bio-impedance
Electronic instrumentation
Biometric circuits
CMOS analog circuits
Sensory systems
Issue DateApr-2010
PublisherElsevier
CitationMicroelectronics Journal 41(4): 231-239 (2010)
AbstractThis paper proposes a method for impedance measurements based on a closed-loop implementation of CMOS circuits. The proposed system has been conceived for alternate current excited systems, performing simultaneously driving and measuring functions, thanks to feedback. The system delivers magnitude and phase signals independently, which can be optimized separately, and can be applied to any kind of load (resistive and capacitive). Design specifications for CMOS circuit blocks and trade-offs for system accuracy and loop stability have been derived. Electrical simulation results obtained for several loads agree with the theory, enabling the proposed method to any impedance measurement problem, in special, to bio-setups including electrodes.
Publisher version (URL)http://dx.doi.org/10.1016/j.mejo.2010.02.006
URIhttp://hdl.handle.net/10261/83179
DOI10.1016/j.mejo.2010.02.006
ISSN0026-2692
Appears in Collections:(IMSE-CNM) Artículos
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