A mixed-mode temperature control circuit for gas sensors

Author

Casanova, R. ; Merino, J.L. ; Dieguez, A. ; Bota, S.A. ; Samitier, J.

Author_Institution

Dept. d´´Electron., Barcelona Univ., Spain

Volume

4

fYear

2004

fDate

23-26 May 2004

Abstract

A mixed-mode temperature control system for gas sensors is described in this work. It has been designed to be capable of controlling different gas sensor structures. The temperature range and accuracy depend on the gas sensor structure but are usually in the range of from room temperature up to 600°C within 1°C accuracy. The circuit has been designed with 0.8 μm HV CMOS AMS technology in order to support the 15 V biasing voltage that is necessary to reach these high temperatures. A serial peripheral interface communication port allows real time monitoring of the heater resistance. It also allows setting of the parameters of the control and temperature reference.

Keywords

CMOS integrated circuits; control system synthesis; electric heating; electric resistance; gas sensors; mixed analogue-digital integrated circuits; temperature control; 0.8 micron; 15 V; 20 to 600 degC; HV CMOS technology; biasing voltage; gas sensors; heater resistance; mixed mode temperature control circuit; real time monitoring; room temperature; serial peripheral interface communication port; CMOS technology; Circuits; Gas detectors; Monitoring; Resistance heating; Temperature control; Temperature dependence; Temperature distribution; Temperature sensors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1329149

Filename

1329149