Robust Readout Circuit with Leakage Current Cancellation Technique for Stretchable Touch Sensors

Kaoru Yamashita, Tokihiko Shimura, Shun Sato, Naoji Matsuhisa, Hiroki Ishikuro

研究成果: Conference contribution

抄録

Stretchable touch sensors are being required for next generation wearable devices. Here, we propose a robust readout circuit with a leakage current cancellation technique (LCCT) to deal with issues unique to the stretchable touch sensors. The LCCT cancels the effect of leakage current which increases when a finger approaches. The circuit's ability to measure both self capacitance (SC) and mutual capacitance (MC) changes enables reliable touch detection. A capacitance variation is compensated by intentionally adding offset voltage. Experimental results showed a performance of the circuit with a signal to noise ratio (SNR) of 27.1 dB when measuring SC and 35.3 dB when measuring MC of a prototype stretchable touch sensor. The effectiveness of the LCCT was demonstrated using an equivalent circuit of the sensor.

本文言語English
ホスト出版物のタイトル2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781728182810
DOI
出版ステータスPublished - 2021
イベント28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Dubai, United Arab Emirates
継続期間: 2021 11月 282021 12月 1

出版物シリーズ

名前2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings

Conference

Conference28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021
国/地域United Arab Emirates
CityDubai
Period21/11/2821/12/1

ASJC Scopus subject areas

  • 人工知能
  • エネルギー工学および電力技術
  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料
  • 器械工学

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