TY - GEN
T1 - A 24 Vpp compliant biphasic stimulator for inductively powered animal behavior studies
AU - Nag, Sudip
AU - Sharma, Dinesh
AU - Thakor, Nitish V.
PY - 2013
Y1 - 2013
N2 - Stimulation of biological neurons using electrical charges has gained popularity in neuro-engineering studies. Wireless power delivery to electrical stimulators is an essential requirement for long term and maintenance-free implantable applications. Voltage compliance is often a limiting factor in these systems. We present an inductively powered biphasic stimulator that is capable of exhibiting 24 Vpp load voltage compliance, while harvesting up to 13 V. The stimulator can deliver currents ranging from 10 μA to 6 mA. The inductive energy harvesting system operates at a low carrier frequency of 134.2 KHz for enhanced depth of penetration in biological medium. The near-field harvester works reliably for up to 50 mm inter-antenna distance. Noise performance and charge balancing accuracy have also been improved due to the absence of a boost switching circuit and floating current source based architecture. In-vivo motor and visual cortex stimulations have been performed using epi-dural screw electrodes on an awake behaving and anesthetized Wister rat.
AB - Stimulation of biological neurons using electrical charges has gained popularity in neuro-engineering studies. Wireless power delivery to electrical stimulators is an essential requirement for long term and maintenance-free implantable applications. Voltage compliance is often a limiting factor in these systems. We present an inductively powered biphasic stimulator that is capable of exhibiting 24 Vpp load voltage compliance, while harvesting up to 13 V. The stimulator can deliver currents ranging from 10 μA to 6 mA. The inductive energy harvesting system operates at a low carrier frequency of 134.2 KHz for enhanced depth of penetration in biological medium. The near-field harvester works reliably for up to 50 mm inter-antenna distance. Noise performance and charge balancing accuracy have also been improved due to the absence of a boost switching circuit and floating current source based architecture. In-vivo motor and visual cortex stimulations have been performed using epi-dural screw electrodes on an awake behaving and anesthetized Wister rat.
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U2 - 10.1109/EMBC.2013.6610232
DO - 10.1109/EMBC.2013.6610232
M3 - Conference contribution
C2 - 24110419
AN - SCOPUS:84886571936
SN - 9781457702167
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 3242
EP - 3245
BT - 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
T2 - 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
Y2 - 3 July 2013 through 7 July 2013
ER -