A 46-nF/10-MΩ Range 114-aF/0.37-Ω Resolution Parasitic-and Temperature-Insensitive Reconfigurable RC-to-Digital Converter in 0.18-μm CMOS
- 주제(키워드) Capacitance , CMOS , Digital conversion , Parasiticc , Reconfigurable , Resistance , Sensor interface , temperature
- 등재 SCIE, SCOPUS
- 발행기관 Institute of Electrical and Electronics Engineers Inc.
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000191041
- 본문언어 영어
- Published As https://doi.org/10.1109/TCSI.2021.3134010
초록/요약
This paper presents a 46 nF/10 M Ω-range, digital-intensive, reconfigurable RC-to-digital converter (R2CDC) that can readout multiple C and R sensors in a time-interleaved fashion. Ratio-metric conversion using swing-boosted period-modulation (SB-PM) front-end by the R2CDC results in 114 aFrms/0.37 Ω rms resolutions and a worst-case temperature-drift of 64.2 ppm/°C over-40 to 125°C. Femto-farad capacitances can be sensed with a relative code-deviation less than 0.16 % even when parasitics vary 30 times the baseline. Implemented in a 0.18 μ m standard CMOS process, the R2CDC consumes 140 μ A from a 1 V supply, occupying an active area of 0.175 μm 2. © 2004-2012 IEEE.
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