Title :
A 600 μW readout circuit with potentiostat for amperometric chemical sensors and glucose meter applications
Author :
Chung, Wen-Yaw ; Paglinawan, Arnold C. ; Wang, Ying-Hsiang ; Kuo, Tsai-Tseng
Author_Institution :
Chung-Yuan Christian Univ., Jhongli
Abstract :
This paper presents a low power electrochemical interface circuit for amperometric sensors. The readout circuit with potentiostat design maintains a constant bias potential between the reference and working electrodes using one operational transconductance amplifier (OTA) and four MOS transistors. Redox currents from 1 to 50 μA can be measured by the readout circuit with maximum nonlinearity of plusmn1 percent over the aforementioned range. The micro instrument has been implemented in 0.35 μm TSMC CMOS technology that consumes only 600 μW of power and occupies a small area of 0.16 mm2. Chip test results emulate the simulation results with good agreement and confirm the effectiveness of the designed system.
Keywords :
MOSFET; amperometric sensors; chemical sensors; low-power electronics; readout electronics; reduction (chemical); MOS transistors; TSMC CMOS technology; amperometric sensors; chemical sensors; glucose meter applications; low power electrochemical interface circuit; operational transconductance amplifier; potentiostat; power 600 μW; readout circuit; redox currents; Amperometric sensors; CMOS technology; Chemical sensors; Circuits; Current measurement; Electrodes; MOSFETs; Operational amplifiers; Sugar; Transconductance;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on
Conference_Location :
Tainan
Print_ISBN :
978-1-4244-0636-4
Electronic_ISBN :
978-1-4244-0637-1
DOI :
10.1109/EDSSC.2007.4450317