Title :
12×12 capacitive matrix touch sensing unit for SoC application in 0.18um CMOS process
Author :
Nam, Chul ; Pu, Young-Gun ; Lee, Kang-Yoon
Author_Institution :
Dept. of Electron. Eng., Konkuk Univ., Seoul, South Korea
Abstract :
This paper describes 12×12 capacitive matrix touch sensing unit. This unit includes a simple common processing unit and input switch array to detect the touch sensing input by Capacitive-time(C-T) conversion method. This touch sensing unit has 41 fF/count resolution with the built-in sensing oscillator. The power consumption of this unit is 60 uA and the occupation area is 0.26 mm2. This unit is implemented by 0.18 um 1.8 V/3.3 V CMOS process.
Keywords :
CMOS integrated circuits; capacitive sensors; power consumption; system-on-chip; tactile sensors; CMOS; SoC; built-in sensing oscillator; capacitive matrix touch sensing unit; capacitive-time conversion method; current 60 muA; input switch array; power consumption; processing unit; size 0.18 mum; system-on-chip; voltage 1.8 V; voltage 3.3 V; wavelength 0.18 mum; CMOS process; Capacitance; Clocks; Logic; Ring oscillators; Sensor arrays; Switches; Switching circuits; Timing; Voltage; Capacitive matrix; Capacitive-time conversion; Common processing unit; Touch sensing;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423788
