Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Unified Potentiostat for Electrochemical Glucose Sensors

  • Sohn, Ki-Sung (Department of Electronic Engineering, Kyungnam University) ;
  • Oh, Seok-Jae (Department of Semiconductor Engineering, Chungbuk National University) ;
  • Kim, Eui-Jin (Department of Semiconductor Engineering, Chungbuk National University) ;
  • Gim, Jeong-Min (Department of Semiconductor Engineering, Chungbuk National University) ;
  • Kim, Nam-Soo (Department of Semiconductor Engineering, Chungbuk National University) ;
  • Kim, Yeong-Seuk (Department of Semiconductor Engineering, Chungbuk National University) ;
  • Kim, Jong-Won (Department of Chemical Engineering, Chungbuk National University)
  • Received : 2013.01.14
  • Accepted : 2013.09.03
  • Published : 2013.10.25
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Abstract

A unified potentiostat circuit for both $O_2$- and $H_2O_2$- based electrochemical glucose sensors was proposed and its function was verified by circuit simulations and measurement results of a fabricated chip. This circuit consisted of an operational amplifier, a comparator and current mirrors. The proposed circuit was fabricated with a $0.13{\mu}m$ thick oxide CMOS process and an active area of $360{\mu}m{\times}100{\mu}m$. The measurements revealed an input operation range from 0.5 V to 1.6 V in the $H_2O_2$- based bio-sensor and from 1.7 V to 2.6 V in the $O_2$- based bio-sensor with a supply voltage of 3.3 V. The evaluation results showed that the proposed potentiostat circuit is suitable for measuring the electrochemical cell currents of both $O_2$- and $H_2O_2$- based glucose sensors.

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