A 1.35 m Long 0.18 gf Resolution Differential Capacitive Force Sensor for Contact Force Monitoring

Sangkuk Jeon, Jiyong Lee, Wonhyoung Ryu, Youngcheol Chae

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper introduces a 1.35 m long differential capacitive force sensor with a small form factor for a catheter integration. The differential force sensor is realized with two polydimethylsiloxane (PDMS) layers having two different rigidity inserted between flexible printed circuit board (FPCB) electrodes. To achieve the higher precision, we also propose the differential driving method which allows the higher driving voltage even in a low supply system, resulting in the higher SNR. By using the driving voltage of 18 Vp-p under 2 V supply system, the proposed sensor interface has accomplished SNR of 58.22 dB at 100 gf and the force error has reduced from 0.24 gf to 0.18 gf with the equivalent capacitance resolution of 22.2 aF. This work has achieved the state-of-art force resolution by using both the differential driving and CP cancellation technique with a miniature sensor. The proposed sensor can be used for a real time contact force measurement during a catheter ablation or the stiffness detection.

Original languageEnglish
Title of host publicationProceedings of TENCON 2018 - 2018 IEEE Region 10 Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781538654576
Publication statusPublished - 2018 Jul 2
Event2018 IEEE Region 10 Conference, TENCON 2018 - Jeju, Korea, Republic of
Duration: 2018 Oct 282018 Oct 31

Publication series

NameIEEE Region 10 Annual International Conference, Proceedings/TENCON
ISSN (Print)2159-3442
ISSN (Electronic)2159-3450


Conference2018 IEEE Region 10 Conference, TENCON 2018
Country/TerritoryKorea, Republic of

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering


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