Interface Circuits for a Portable Electronic Nose Based on Surface Acoustic Wave Sensor Array

• Main Authors: Li, Cheng-Han, 李承漢
• Other Authors: Tang, Kea-Tiong
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/57137278871938393873

碩士 === 國立清華大學 === 電機工程學系 === 98 === Electronic nose system is the world's popular field of studies, it can be widely applied to various industries and daily life. This thesis hopes to increase the convenience of the electronic nose system, the applicable site of electronic nose system can’t be constraints, and low cost. Surface Acoustic Wave sensors with high sensitivity, fast response, etc., is very suitable for as gas sensors. Use of non-continuous surface acoustic wave gas sensor array measured power consumed by the lower, extend the operating hours of portable devices. It realization of SAW sensor interface circuits by using 0.18μm CMOS process in this work. The three types of circuits are digital, analog and mixed-mode SAW array interface circuit, the performance of the mixed-mode circuits is the best one, the power consumption is only 1.48mW, the resolution is 10Hz, suitable for the SAW output frequency of about 100MHz sensor array. The interface can be combined with wireless transmission to send data to the receiver storage and analysis.