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A high resolution capacitance deviation-to-digital converter utilizing time stretching

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Authors

Kim, Manho; Xing, Nan; Shin, Dong-Yong; Lee, Hyunjoong; Kim, Suhwan

Issue Date
2009-09
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
IEEE International SoC Conference, Belfast, 9-11 Sept. 2009
Keywords
capacitancecapacitive sensorsdelaysmedical signal detectionmembranesmolecular biophysics
Abstract
We present a capacitance deviation-to-digital
converter (CDC) for the thin membrane transducers
(TMT) used for bio-molecular detection. Our CDC
consists of a capacitance deviation-to-time
converter (CTC), time-stretchers, and a time-todigital
converter (TDC). The time-stretchers are
innovatively adopted to achieve higher resolution of
the CDC with expanse of moderate power
consumption. Designed and simulated in 0.35um
CMOS bulk technology, the CDC has a resolution
of 370aF with a maximum error of 0.027‰, at a rate
of 700 samples per second.
Language
English
URI
https://hdl.handle.net/10371/70055
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