IEEE Solid-State Circuits Magazine - Spring 2014 - 88
► High-Resolution and Large-Area Touch Sensor for
Interactive and Natural Human Interfaces
► Two-Step Dual-Mode Capacitance Scan Scheme
Conventional
Exhaustive
Global MCM
Ghost
80*80*tMCM
Actual
ActualTouch
Touch
o t
Proposed
Local
SCM MCM
Points
Ghost
tSCM + 16*tMCM
Step 1: Flash
Self-Capacitance
Measurement (SCM)
Step 2: Local
Mutual-Capacitance
Measurement (MCM)
Timing Chart
t
Electronic Whiteboard
Interactive Digital Signage
Figure 10: A two-step dual-mode capacitance scan for a 1-mm high-resolution touch sensing panel.
be cumbersome, raises social stigma,
and limits usage in water. Figure 12
shows the block diagram of the fully
implantable CI SoC, which provides an
internalized or highly desirable invisible solution. The middle-ear mounted
piezoelectric sensor provides implantable acoustic sensing. A reconfigurable
digital sound processor enables system
power scalability. An arbitrary waveform neural stimulator provides 20-30%
stimulation power savings. Frequency
response of the mounted sensor and
SoC charge amplifier for input sound
levels from 40 to 90 dB SPL.
Acknowledgments
In the preparation of these demonstration sessions, I wish to first acknowledge the authors of the participating
papers. Their work has been organized and structured under the joint
chairmanship of Bill Bowhill (Intel)
and myself (Mediatek) and the Demonstration Session Committee: Roman
Genov (University of Toronto), Tetsuya
Iizuka (University of Tokyo), Chewnpu
Jou (TSMC), Tae-Chan Kim (Samsung),
Li Lin (Marvell Semiconductor), Saska
Lindfors (Texas Instruments), Masaitsu Nakajima (Panasonic), Byeong-Gyu
Nam (Chungnam National University),
Tobias Noll (RWTH Aachen University),
Direct Audio Input
"Europlug"
Standard Interface
Wireless OUT
Audio
SoC
R
+BAT
MIC
PWM
DSP
R
ADC
VBAT
+
Earphone Battery
R
GND
-BAT
Coil
VCC VDD DCDC
XTAL 220 uF 47 uF Coil
Power
Management
DSP
VBAT
VCC
VDD
VBAT
GND
R
GND
Radio
Codec
+
PLC
SRC
Analog
Audio
Output
OUT
∆Σ Control
Figure 11: A universal Rx module, interface, and wireless audio SoC architecture.
88
s p r i n g 2 0 14
Hearing Aid
Wireless
with Wirel
Receiver
Audio Rec
IEEE SOLID-STATE CIRCUITS MAGAZINE
Wireless
Microphone
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