Title :
A low-voltage, chemical sensor interface for systems-on-chip: the fully-differential potentiostat
Author :
Martin, Steven M. ; Gebara, Fadi H. ; Strong, Timothy D. ; Brown, Richard B.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Amperometric chemical sensing systems implemented in deep-submicron processes can meet the dimensional and functional requirements for bio-implantable and remote sensing applications. The low-voltage nature of these processes, however, limits the functionality of the sensor´s electronic interface, the potentiostat. A new, fully-differential (FD) potentiostat that mitigates these problems is presented. The FD potentiostat was implemented in TSMC´s 0.18 μm CMOS process and experimentally verified. The circuit maintains full functionality while operating at half the supply voltage of standard architectures. Analytes of biological and environmental importance are chemically analyzed using the FD potentiostat. Results indicate that the FD potentiostat enables system-on-chip sensor technology which may one day lead to pervasive sensing.
Keywords :
CMOS integrated circuits; amperometric sensors; electrochemical analysis; integrated circuit modelling; prosthetics; remote sensing; system-on-chip; 0.18 micron; CMOS process; amperometric chemical sensing system; bioimplantable application; chemical sensor interface; environmental importance; fully differential potentiostat; remote sensing application; sensor electronic interface; sensor technology; submicron process; systems-on-chip; Biochemical analysis; CMOS process; Chemical analysis; Chemical and biological sensors; Chemical processes; Chemical sensors; Circuits; Remote sensing; System-on-a-chip; Voltage;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329148
