Single chip dual plate capacitive proximity sensor with high noise immunity

Yong Sin Kim, Soon Ik Cho, Dong Ho Shin, Jingu Lee, Kwang Hyun Baek

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

This letter presents a dual plate capacitive proximity sensor (PS) that is integrated into a single chip with high environmental noise immunity. To efficiently reject environmental noise, the proposed PS employs two noise rejection techniques: 1) the use of a switched-charge amplifier and 2) synchronous sampling/filtering technique. The proposed PS is fabricated using a standard CMOS 0.5-μm process, and it occupies an area of 0.7 mm×0.3 mm. Experimental results show that the proposed PS can detect an object up to 8 cm away from the sensor at an average current of 370 μA with a resolution of 1% output frequency.

Original languageEnglish
Article number6651688
Pages (from-to)309-310
Number of pages2
JournalIEEE Sensors Journal
Volume14
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

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Proximity sensors
Capacitive sensors
immunity
proximity
chips
sensors
rejection
Sampling
CMOS
amplifiers
sampling
Sensors
output

Keywords

  • Capacitive
  • Dual plate
  • Noise immunity
  • Proximity sensor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

Single chip dual plate capacitive proximity sensor with high noise immunity. / Kim, Yong Sin; Cho, Soon Ik; Shin, Dong Ho; Lee, Jingu; Baek, Kwang Hyun.

In: IEEE Sensors Journal, Vol. 14, No. 2, 6651688, 01.01.2014, p. 309-310.

Research output: Contribution to journalArticle

Kim, Yong Sin ; Cho, Soon Ik ; Shin, Dong Ho ; Lee, Jingu ; Baek, Kwang Hyun. / Single chip dual plate capacitive proximity sensor with high noise immunity. In: IEEE Sensors Journal. 2014 ; Vol. 14, No. 2. pp. 309-310.
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