@inproceedings{Williams:2012:10.1109/ISCAS.2012.6271420,
author = {Williams, I and Constandinou, TG},
doi = {10.1109/ISCAS.2012.6271420},
title = {An Energy-Efficient, Dynamic Voltage Scaling Neural Stimulator for a Proprioceptive Prosthesis},
url = {http://dx.doi.org/10.1109/ISCAS.2012.6271420},
year = {2012}
}

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TY  - CPAPER
AB  - This paper presents an energy-efficient neuralstimulator capable of providing charge-balanced asymmetric pulses. Power consumption is reduced by implementing a fully-integrated DC-DC converter that uses a reconfigurable switched capacitor topology to provide 4 output voltages for DynamicVoltage Scaling (DVS). DC conversion efficiencies of between 63% and 76% are achieved using integrated capacitances of under 1nF and the DVS approach offers power savings of up to 53.5%compared to the front end of a typical current controlled neural stimulator. Charge balancing is achieved to a low level of accuracy on a single pulse and a much higher accuracy over a series ofpulses. The method used is robust to process and component variation and does not require any initial or ongoing calibration. Monte-Carlo simulations indicate that the charge imbalance willbe less than 0.014% (at  3 sigma ) of charge delivered for a series of pulses. The circuit has been designed in a commercially-available0.18 m HV CMOS technology and requires a die areaof <0.5 sq. mm for a 16 channel implementation.
AU  - Williams,I
AU  - Constandinou,TG
DO  - 10.1109/ISCAS.2012.6271420
PY  - 2012///
SN  - 0271-4302
TI  - An Energy-Efficient, Dynamic Voltage Scaling Neural Stimulator for a Proprioceptive Prosthesis
UR  - http://dx.doi.org/10.1109/ISCAS.2012.6271420
UR  - http://hdl.handle.net/10044/1/9821
ER  - 

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