Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

Hyunggu Park; Hongjin Kim; Joohyung Lee; Kang Yoon Lee; Jin Gyun Chung

doi:10.1109/ISCAS.2012.6271671

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

Hyunggu Park^*
, Hongjin Kim
, Joohyung Lee
, Kang Yoon Lee
, Jin Gyun Chung

^*Corresponding author for this work

Division of Electronic Engineering

Sungkyunkwan University

Research output: Conference(x) › Paper › peer-review

2 Scopus citations

Abstract

This paper presents a multi-channel capacitive touch sensing unit for SoC applications. This unit includes a simple common processing unit and switch array to detect the touch sensing input by capacitive-time(C-T) conversion method. This touch sensor ASIC is designed based on the Capacitive-Time(C-T) conversion method to have advantages of small current and chip area, and the minimum resolution of the unit is 41 fF per count with the built-in sensing oscillator, LDO regulator and I2C for no additional external components. This unit is implemented in 0.18 um CMOS process with dual supply voltage of 1.8 V and 3.3 V. The total power consumption of the unit is 60 uA and the area is 0.26 mm ².

Original language	English
Pages	2003-2006
Number of pages	4
DOIs	https://doi.org/10.1109/ISCAS.2012.6271671
State	Published - 2012
Event	2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 - Seoul, Korea, Republic of Duration: 2012.05.20 → 2012.05.23

Conference

Conference	2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012
Country/Territory	Korea, Republic of
City	Seoul
Period	12.05.20 → 12.05.23

Quacquarelli Symonds(QS) Subject Topics

Computer Science & Information Systems
Engineering - Electrical & Electronic
Engineering - Petroleum

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10.1109/ISCAS.2012.6271671

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title = "Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method",

abstract = "This paper presents a multi-channel capacitive touch sensing unit for SoC applications. This unit includes a simple common processing unit and switch array to detect the touch sensing input by capacitive-time(C-T) conversion method. This touch sensor ASIC is designed based on the Capacitive-Time(C-T) conversion method to have advantages of small current and chip area, and the minimum resolution of the unit is 41 fF per count with the built-in sensing oscillator, LDO regulator and I2C for no additional external components. This unit is implemented in 0.18 um CMOS process with dual supply voltage of 1.8 V and 3.3 V. The total power consumption of the unit is 60 uA and the area is 0.26 mm 2.",

author = "Hyunggu Park and Hongjin Kim and Joohyung Lee and Lee, \{Kang Yoon\} and Chung, \{Jin Gyun\}",

year = "2012",

doi = "10.1109/ISCAS.2012.6271671",

language = "English",

pages = "2003--2006",

note = "2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012 ; Conference date: 20-05-2012 Through 23-05-2012",

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T1 - Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

AU - Park, Hyunggu

AU - Kim, Hongjin

AU - Lee, Joohyung

AU - Lee, Kang Yoon

AU - Chung, Jin Gyun

PY - 2012

Y1 - 2012

N2 - This paper presents a multi-channel capacitive touch sensing unit for SoC applications. This unit includes a simple common processing unit and switch array to detect the touch sensing input by capacitive-time(C-T) conversion method. This touch sensor ASIC is designed based on the Capacitive-Time(C-T) conversion method to have advantages of small current and chip area, and the minimum resolution of the unit is 41 fF per count with the built-in sensing oscillator, LDO regulator and I2C for no additional external components. This unit is implemented in 0.18 um CMOS process with dual supply voltage of 1.8 V and 3.3 V. The total power consumption of the unit is 60 uA and the area is 0.26 mm 2.

AB - This paper presents a multi-channel capacitive touch sensing unit for SoC applications. This unit includes a simple common processing unit and switch array to detect the touch sensing input by capacitive-time(C-T) conversion method. This touch sensor ASIC is designed based on the Capacitive-Time(C-T) conversion method to have advantages of small current and chip area, and the minimum resolution of the unit is 41 fF per count with the built-in sensing oscillator, LDO regulator and I2C for no additional external components. This unit is implemented in 0.18 um CMOS process with dual supply voltage of 1.8 V and 3.3 V. The total power consumption of the unit is 60 uA and the area is 0.26 mm 2.

UR - https://www.scopus.com/pages/publications/84866617481

U2 - 10.1109/ISCAS.2012.6271671

DO - 10.1109/ISCAS.2012.6271671

M3 - Paper

AN - SCOPUS:84866617481

SP - 2003

EP - 2006

T2 - 2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012

Y2 - 20 May 2012 through 23 May 2012

ER -

Low power multi-channel capacitive touch sensing unit using capacitor to time conversion method

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Quacquarelli Symonds(QS) Subject Topics

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