Design of current-mirror-based CMOS potentiostat for amperometric chemical sensors

CHEN Kun1; MENG Li-ya1; LAI Xiao-feng2; LIU Ze-dong1; HU Da-jiang1

doi:10.13873/j.1000-97872011.05.009

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Design of current-mirror-based CMOS potentiostat for amperometric chemical sensors

更新时间：2025-09-11

- Design of current-mirror-based CMOS potentiostat for amperometric chemical sensors
- Vol. 30, Issue 5, Pages: 107-109(2011)
- 作者机构：
  
  1. 重庆大学光电技术及系统教育部重点实验室
  2. 中国航天科工集团〇六一基地3405厂
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872011.05.009
  CLC： TH832
- Published：2011
- 稿件说明：
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[1]陈坤,孟丽娅,赖小峰,刘泽东,胡大江.基于电流镜的电化学CMOS恒电位仪的设计[J].传感器与微系统,2011,30(05):107-109.

CHEN Kun1, MENG Li-ya1, LAI Xiao-feng2, et al. Design of current-mirror-based CMOS potentiostat for amperometric chemical sensors[J]. 2011, 30(5): 107-109.
[1]陈坤,孟丽娅,赖小峰,刘泽东,胡大江.基于电流镜的电化学CMOS恒电位仪的设计[J].传感器与微系统,2011,30(05):107-109. DOI： 10.13873/j.1000-97872011.05.009.

CHEN Kun1, MENG Li-ya1, LAI Xiao-feng2, et al. Design of current-mirror-based CMOS potentiostat for amperometric chemical sensors[J]. 2011, 30(5): 107-109. DOI： 10.13873/j.1000-97872011.05.009.

摘要

设计了一种基于电流镜的三电极电化学传感器CMOS恒电位仪电路

由控制运放、电流镜和单端输出的跨导放大器构成。与传统的恒电位仪相比

该电路结构简单

减少了读出电路的功耗和版图面积

具有较宽的动态范围。在CSMC 0.5μm2PTMCMOS工艺下

用Spectre仿真器对电路进行了模拟

仿真结果表明:传感电流范围为20 pA～20μA

动态范围可达120 dB。

Abstract

A CMOS potentiostat based on three-electrode amperometric chemical sensor is designed.The circuit is formed by the control amplifier

current-mirror and the single-ended OTA.Compared with the traditional design

this structure has several advantages

for example the power consumption is lower

the layout area is smaller and the range of sensing current is wider.Simulation is carried out with 0.5 μm CMOS process by Spectre emulator

the current-sensing range is from 20 pA ～20 μA.Dynamic range is 120 dB.

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references

恒电位仪研究现状及基于恒电位仪的电化学检测系统的应用 [J]. 钟海军,邓少平. 分析仪器 . 2009(02)

电化学气敏传感器的原理及其应用 [J]. 胡茜,葛思擘,王伊卿,李伟. 仪表技术与传感器 . 2007(05)

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