A 1-V 2.6-mW Environmental Compensated Fully Integrated Nose-on-a-Chip

Ting I. Chou, Kwuang Han Chang, Jia Yin Jhang, Shih Wen Chiu, Guoxing Wang, Chia Hsiang Yang, Her-Ming Chiueh, Hsin Chen, Chih Cheng Hsieh, Meng Fan Chang, Kea Tiong Tang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Miniature gas detection system is desirable for many applications. In this brief, we propose a fully integrated nose-on-a-chip for mobile phones and wearable devices. The chip has 36 on-chip sensors, a 36-channel adaptive interface with an integrated programmable amplifier, a four-channel frequency readout interface, one on-chip temperature sensor, a successive approximation analog-to-digital converter, a scalable learning kernel cluster, and a reduced instruction set computing core with low-voltage static random-access memory. This chip is fabricated using the TSMC 180-nm CMOS process and consumes 2.6 mW at 1 V. on-chip temperature and humidity sensors are included in this system for acquiring environmental information. An environmental compensation algorithm based on common principal components analysis is also implemented for high-accuracy odor classification. This fully integrated nose-on-a-chip provides promising results for odor detection and classification for use in mobile and wearable device applications.

Original languageEnglish
Article number8409334
Pages (from-to)1365-1369
Number of pages5
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number10
StatePublished - 1 Oct 2018


  • Nose-on-a-chip
  • e-nose system
  • environmental compensation
  • system on chip (SoC)

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