A power-efficient, bi-directional readout interface circuit for cyclic-voltammetry electrochemical sensors

Yi Chia Chen, Shao Yung Lu, Jui Hsiang Tsai, Yu Te Liao

研究成果: Conference contribution同行評審

2 引文 斯高帕斯(Scopus)

摘要

This paper presents an electrochemical sensing front-end circuit with a cyclic voltammetry potentiostat. To accommodate a large and bidirectional current sensing range for the current-mirror based potentiostat, a constant offset current is added. With the technique of chopper-stabilization, the flicker noise of the readout circuit is successfully reduced. A charge-based oscillator is also proposed in this paper to convert the current into a frequency for further data readout. The proposed readout IC was fabricated in a 0.18μm, 1.2V CMOS process and the current range is -2μA 12.2μA, the R2 linearity of 0.992, with a minimum detectable current of 3.1nA. The dynamic current range is 73.2dB whereas the chip consumes 40.5μW at a maximum sensing current of 12.2μA.

原文English
主出版物標題2019 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2019
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781728106557
DOIs
出版狀態Published - 4月 2019
事件2019 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2019 - Hsinchu, Taiwan
持續時間: 22 4月 201925 4月 2019

出版系列

名字2019 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2019

Conference

Conference2019 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2019
國家/地區Taiwan
城市Hsinchu
期間22/04/1925/04/19

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