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

Department of Electronic and Electrical Engineering

Research output: Contribution to conference › 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: 20 May 2012 → 23 May 2012

Conference

Conference	2012 IEEE International Symposium on Circuits and Systems, ISCAS 2012
Country/Territory	Korea, Republic of
City	Seoul
Period	20/05/12 → 23/05/12

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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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