Automatic current range detection for biochemical sensor

Author

Wei-Jun Liu ; Ming-Han Yu ; Bin-Da Liu ; Chia-Ling Wei

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2014

Firstpage

196

Lastpage

197

Abstract

In this paper, a current sensing mechanism for biochemical sensor is presented. The sensing circuit consists of current conveyor, current mirror, current range detection circuit, and current to digital converter. The chip can be integrated in a potentiostat system. This work is implemented in TSMC 0.18-μm CMOS process, and the area is 0.5625 mm². The measured current ranges from 20 μA to 1200 μA with average linear correlation (R-squared) of 0.9986. The power consumption of the proposed circuit is 1.41 mW from 1.8 V power supply.

Keywords

CMOS integrated circuits; biomedical electronics; biomedical equipment; biosensors; electrochemical sensors; signal conditioning circuits; CMOS process; automatic current range detection; biochemical sensor; current conveyor; current mirror; current range detection circuit; current sensing mechanism; current-digital converter; potentiostat system; power 1.41 mW; size 0.18 mum; voltage 1.8 V; Biomedical monitoring; CMOS integrated circuits; Current measurement; Electrodes; Monitoring; Power measurement; Semiconductor device measurement; Biochemical sensor; current mirror; current range detection circuit; potentiostat;

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference (ISOCC), 2014 International

Type

conf

DOI

10.1109/ISOCC.2014.7087621

Filename

7087621