Characterisation of a CMOS current drive chip for an array of six polymeric resistive gas sensors

摘要

In this paper we describe the characterisation of a full custom analysogue current drive chip fabricated using the alcatel Mieec 2.4 #mu# m CMOS process. The chip has been designed to drive currents in the micro-amp range through an array of six resistive polymer mkcro-bridge devices. It exibites good d.c, stagbility, and a linear temperature coeffieicnet of about-1.2x10~(-3)/ deg C. The chip can be drive in an a.c. as well as in a d.c. and gives a stable pulsed current source at frequencies of up to 10 kHz.