A Low-Power Electronic Nose Signal-Processing Chip for a Portable Artificial Olfaction System

作者：Tang Kea Tiong^*; Chiu Shih Wen; Chang Meng Fan; Hsieh Chih Cheng; Shyu Jyuo Min

来源：IEEE Transactions on Biomedical Circuits and Systems, 2011, 5(4): 380-390.

DOI：10.1109/TBCAS.2011.2116786

• Artificial olfaction
• electronic nose
• gas classification
• portable system
• signal-processing chip

The bulkiness of current electronic nose (E-Nose) systems severely limits their portability. This study designed and fabricated an E-Nose signal-processing chip by using TSMC 0.18-mu m 1P6M complementary metal-oxide semiconductor technology to overcome the need to connect the device to a personal computer, which has traditionally been a major stumbling block in reducing the size of E-Nose systems. The proposed chip is based on a conductive polymer sensor array chip composed of multi-walled carbon nanotubes. The signal-processing chip comprises an interface circuit, an analog-to-digital converter, a memory module, and a microprocessor embedded with a pattern-recognition algorithm. Experimental results have verified the functionality of the proposed system, in which the E-Nose signal-processing chip successfully classified three odors, carbon tetrachloride (CCl4), chloroform (CHCl3), and 2-Butanone (MEK), demonstrating its potential for portable applications. The power consumption of this signal-processing chip was maintained at a very low 2.81 mW using a 1.8-V power supply, making it highly suitable for integration as an electronic nose system-on-chip.

• 出版日期2011-8
• 单位清华大学