Title :
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
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;
Conference_Titel :
SoC Design Conference (ISOCC), 2014 International
DOI :
10.1109/ISOCC.2014.7087621
