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A 16-channel 24-V 1.8-mA power efficiency enhanced neural/muscular stimulator with exponentially decaying stimulation current

Title
A 16-channel 24-V 1.8-mA power efficiency enhanced neural/muscular stimulator with exponentially decaying stimulation current
Authors
Liu, X.[Liu, Xu]Yao, L.[Yao, Lei]Li, P.[Li, Peng]Yan, M.[Yan, Mei]Yen, S.-C.[Yen, Shih-Cheng]Yu, H.[Yu, Hao]Je, M.[Je, Minkyu]Xu, Y.P.[Xu, Yong Ping]
DGIST Authors
Je, M.[Je, Minkyu]
Issue Date
2015
Citation
IEEE International Symposium on Circuits and Systems, ISCAS 2015, 2015-July, 2992-2995
Type
Conference
Article Type
Conference Paper
ISSN
0271-4310
Abstract
This paper presents a current-mode neural/muscular stimulator with an exponentially decaying stimulation current. The use of exponentially decaying current makes the voltage on the stimulating electrode constant during the stimulation, which eliminates the headroom and increases the power efficiency. A simple exponentially decaying current generator is proposed based on Taylor series approximation and implemented in a 16-channel prototype stimulator IC. The prototype IC is fabricated in a 0.18-μm CMOS process with high-voltage LDMOS option, occupying a core area of 1.65 mm × 1.65 mm. The stimulator is tested with different loads, which mimics the electrode impedances, and the measured results show that maximum stimulation power efficiency of 95.9% can be achieved at the output stage of the stimulator. Depending on the electrode impedance and stimulation current, the power efficiency can be improved by nearly 10% at the output stage, compared to traditional constant-current stimulator. © 2015 IEEE.
URI
http://hdl.handle.net/20.500.11750/3700
DOI
10.1109/ISCAS.2015.7169316
Publisher
Institute of Electrical and Electronics Engineers Inc.
Files:
There are no files associated with this item.
Collection:
Information and Communication EngineeringIMPACT Lab2. Conference Papers


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