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A Low-Distortion Current-Mode Signal Generator for Wide-Range Bioimpedance Spectroscopy
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electronics and Embedded systems. (Mixed-Signals ICs and Systems)ORCID iD: 0000-0001-7549-0858
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electronics and Embedded systems, Integrated devices and circuits.ORCID iD: 0000-0003-3802-7834
2023 (English)In: ISCAS 2023: 56th IEEE International Symposium on Circuits and Systems, Proceedings, IEEE, 2023Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a low-distortion current-mode sinusoidal signal generator for bioimpedance spectroscopy measurements. The proposed full current-mode operation enables linearity enhancement and potential savings in silicon area and power consumption. Programmability in the low-pass filter and current driver enables impedance measurements from 0.2 Ω to10 kΩ over a wide frequency range from 1 kHz to 1 MHz.The current generator, designed in a 0.18 μm CMOS process, consumes between 736 μW at the lowest frequency and gain, and 1.70 mW at the highest frequency and gain, and occupies 1.76 mm2 silicon area. Post-layout simulation results show a spurious-free dynamic range larger than 40 dBc over the entire frequency range, which enables bioimpedance measurements with errors below 1%, as it is required for wearable devices evaluating neuromuscular disorders.

Place, publisher, year, edition, pages
IEEE, 2023.
Keywords [en]
bioimpedance spectroscopy, sinusoidal signal generator, current-mode, programmable gain, programmable low-pass filter, low-distortion.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-328912DOI: 10.1109/ISCAS46773.2023.10181880ISI: 001038214602012Scopus ID: 2-s2.0-85167652994OAI: oai:DiVA.org:kth-328912DiVA, id: diva2:1766887
Conference
56th IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, California, May 21-25, 2023
Funder
Swedish Foundation for Strategic Research, ITM17-0079
Note

Part of ISBN 978-1-6654-5109-3

QC 20231002

Available from: 2023-06-13 Created: 2023-06-13 Last updated: 2023-10-02Bibliographically approved

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fulltext(1402 kB)125 downloads
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Fernández Schrunder, AlejandroRusu, Ana

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