Title :
A constant power heating circuit for integrated gas sensor application
Author :
Chan, Sunny S W ; Chan, Philip C.H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, Hong Kong
Abstract :
This paper reports a novel circuit to supply constant heating power to the micro-hotplate for integrated gas sensor applications. The circuit is designed so that the heating power is maintained constant in spite of the change of heater resistance value due to process variations. By controlling the biasing current of the power control circuit, the heating power can be controlled linearly. The circuit is realized using CMOS. Simulation shows that the heating power can be controlled at ±0.4% with ±50% changes in heating resistance
Keywords :
CMOS analogue integrated circuits; analogue multipliers; gas sensors; power control; power integrated circuits; CMOS; analogue multipliers; biasing current; constant power heating circuit; heater resistance value; heating resistance; integrated gas sensor application; micro-hotplate; power control circuit; process variations; Circuit synthesis; Feedback circuits; Gas detectors; Heating; MOSFETs; Power control; Resistors; Temperature control; Temperature sensors; Voltage control;
Conference_Titel :
Electron Devices Meeting, 1996., IEEE Hong Kong
Print_ISBN :
0-7803-3091-9
DOI :
10.1109/HKEDM.1996.566293
