Title :
6.6 A 240Hz-reporting-rate mutual-capacitance touch-sensing analog front-end enabling multiple active/passive styluses with 41dB/32dB SNR for 0.5mm diameter
Author :
Hamaguchi, Mutsumi ; Takeda, Michiaki ; Miyamoto, Masayuki
Author_Institution :
SHARP, Tenri, Japan
Abstract :
A mutual-capacitance touch-sensing architecture and a system that enables concurrent usage of multiple active styluses having different properties such as color, thickness, shape, etc., are developed and verified with use of an existing touch controller [1]. An extension of the architecture to handle wireless active styluses is also developed and verified with an analog front-end (AFE) IC.
Keywords :
capacitance measurement; capacitive sensors; tactile sensors; AFE IC; frequency 240 Hz; multiple active-passive stylus; mutual-capacitance touch-sensing analog front-end architecture; noise figure 32 dB; noise figure 41 dB; size 0.5 mm; touch controller; wireless active stylus; Capacitance; Integrated circuits; Signal to noise ratio; Synchronization; Tactile sensors; Wireless communication; Wireless sensor networks;
Conference_Titel :
Solid- State Circuits Conference - (ISSCC), 2015 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-6223-5
DOI :
10.1109/ISSCC.2015.7062955
