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- W3129343311 abstract "A cyclic voltammetry electrochemical sensing chip was implemented with a time-based readout circuit and a current feedback control loop for wide-range and high-linearity current detection. The design utilizes a chopper-stabilized, low-noise potentiostat circuit and a delay chain time-to-digital converter to improve accuracy and the conversion rate. A current feedback loop is employed to mitigate nonlinearity of the current-to-frequency converter. Also, an on-chip pattern generator with a current reducer is used to create area-efficient, multi-rate ramp signals for cyclic voltammetry and fast-scan cyclic voltammetry measurements. The chip is fabricated using a 0.18-μm CMOS process. It achieves an 8-nA current resolution in the current range of -7 μA to 10 μA with an R2 linearity of 0.999 while consuming 19 μW. The Allan deviation floor is 4.83 Hz at the 7-second integration window, resulting in an 87-pArms input-referred current noise. The applicable limit of detection for K3[Fe(CN)6] concentration is 31 pM. To measure various reactions, the scan rate can be adjusted from 0.008 V/s to 400 V/s with a throughput data rate of up to 50 kS/s." @default.
- W3129343311 created "2021-03-01" @default.
- W3129343311 creator A5055113413 @default.
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- W3129343311 date "2021-04-01" @default.
- W3129343311 modified "2023-10-16" @default.
- W3129343311 title "A 19 μW, 50 kS/s, 0.008-400 V/s Cyclic Voltammetry Readout Interface With a Current Feedback Loop and On-Chip Pattern Generation" @default.
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- W3129343311 doi "https://doi.org/10.1109/tbcas.2021.3062377" @default.
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