A 6.9mW 120fps 28×50 capacitive touch sensor for 1mm-φ stylus using current-driven ΔΣ ADCs

Hyunseok Hwang, Hyeyeon Lee, Youngcheol Chae

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

Abstract

This paper presents a 6.9mW 120fps 28×50 channels capacitive touch sensor for 1mm-φ stylus. A current conveyor analog front-end enables a current signaling before its voltage conversion. A current-driven ΔΣ ADC directly interfaces to the differential current for the digital conversion. A test IC is fabricated in 0.18μm CMOS process. This work achieves SNR of 41.7dB with 1mm-φ stylus, consuming only 6.9mW. This results in an energy efficiency of 0.41nJ/step which is more than 4× improvement on the state-of-the-art works.

Original languageEnglish
Title of host publicationASP-DAC 2018 - 23rd Asia and South Pacific Design Automation Conference, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages305-306
Number of pages2
ISBN (Electronic)9781509006021
DOIs
Publication statusPublished - 2018 Feb 20
Event23rd Asia and South Pacific Design Automation Conference, ASP-DAC 2018 - Jeju, Korea, Republic of
Duration: 2018 Jan 222018 Jan 25

Publication series

NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC
Volume2018-January

Other

Other23rd Asia and South Pacific Design Automation Conference, ASP-DAC 2018
CountryKorea, Republic of
CityJeju
Period18/1/2218/1/25

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design

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