DocumentCode :
46731
Title :
A Monolithically Integrated Pressure/Oxygen/Temperature Sensing SoC for Multimodality Intracranial Neuromonitoring
Author :
Wai Pan Chan ; Narducci, Margarita ; Yuan Gao ; Ming-Yuan Cheng ; Jia Hao Cheong ; George, Aby K. ; Daw Don Cheam ; Siew Chong Leong ; Damalerio, Maria Ramona B. ; Ruiqi Lim ; Ming-Ling Tsai ; Rahman, Abdur R. A. ; Mi Kyoung Park ; Zhi Hui Kong ; Prashant
Author_Institution :
Inst. of Microelectron., Agency for Sci., Technol. & Res. (A*STAR), Singapore, Singapore
Volume :
49
Issue :
11
fYear :
2014
fDate :
Nov. 2014
Firstpage :
2449
Lastpage :
2461
Abstract :
A fully integrated SoC for multimodality intracranial neuromonitoring is presented in this paper. Three sensors including a capacitive MEMS pressure sensor, an electrochemical oxygen sensor and a solid-state temperature sensor are integrated together in a single chip with their respective interface circuits. Chopper stabilization and dynamic element matching techniques are applied in sensor interface circuits to reduce circuit noise and offset. On-chip calibration is implemented for each sensor to compensate process variations. Measured sensitivity of the pressure, oxygen, and temperature sensors are 18.6 aF/mmHg, 194 pA/mmHg, and 2 mV/°C, respectively. Implemented in 0.18 m CMOS, the SoC occupies an area of 1.4 mm × 4 mm and consumes 166 μW DC power. A prototype catheter for intracranial pressure (ICP) monitoring has been implemented and the performance has been verified with ex vivo experiment.
Keywords :
biomedical measurement; brain; calibration; capacitive sensors; chemical sensors; neurophysiology; oxygen; patient monitoring; pressure sensors; system-on-chip; temperature sensors; SoC; capacitive MEMS pressure sensor; chopper stabilization; dynamic element matching; electrochemical oxygen sensor; multimodality intracranial neuromonitoring; pressure-oxygen- temperature sensing; solid-state temperature sensor; temperature sensors; Capacitance; Capacitive sensors; Electrodes; Micromechanical devices; System-on-chip; Temperature sensors; Capacitance to voltage converter (CVC); capacitive pressure sensor; electrochemical oxygen sensor; intracranial pressure (ICP); temperature sensor; traumatic brain injury (TBI);
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2014.2345754
Filename :
6883227
Link To Document :
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