A 45-dB, 150-Hz, and 18-mW Touch Controller for On-Cell Capacitive TSP Systems

Author

Yeong-Shin Jang ; Young-Hun Ko ; Jung-Min Choi ; Hyung-Seog Oh ; Sang-Gug Lee

Author_Institution

Dept. of Inf. & Commun. Eng., Korea Adv. Inst. of Technol., Daejeon, South Korea

Volume

61

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

748

Lastpage

752

Abstract

A touch controller is proposed for on-cell capacitive touch screen panel systems, which adopts a newly proposed peaking noise detector and low-frequency rejection filters. Implemented in a 0.35-μmCMOS, the proposed touch controller with 3.3-V drive signal shows the maximum signal-to-noise ratio and scan rate of 45 dB and 150 Hz, respectively, while consuming 18 mW from a 3.3-V supply.

Keywords

CMOS integrated circuits; touch sensitive screens; CMOS; drive signal; frequency 150 Hz; low-frequency rejection filters; maximum signal-to-noise ratio; on-cell capacitive TSP systems; peaking noise detector; power 18 mW; size 0.35 mum; touch controller; touch screen panel systems; voltage 3.3 V; Capacitance; Charge transfer; Dynamic range; Finite impulse response filters; Sensors; Signal to noise ratio; Embedded-type touch screen panel (TSP); noise detector; on-cell TSP; touch controller;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2014.2345292

Filename

6871389