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A high resolution capacitance deviation-to-digital converter utilizing time stretching
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- Authors
- Issue Date
- 2009-09
- Citation
- IEEE International SoC Conference, Belfast, 9-11 Sept. 2009
- Keywords
- capacitance ; capacitive sensors ; delays ; medical signal detection ; membranes ; molecular 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
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