TY - GEN
T1 - A power-efficient switched-capacitor stimulating system for electrical/optical deep-brain stimulation
AU - Lee, Hyung Min
AU - Kwon, Ki Yong
AU - Li, Wen
AU - Ghovanloo, Maysam
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Deep-brain stimulation (DBS) has been proven as an effective therapy to alleviate Parkinson's disease, tremor, and dystonia. Towards a less invasive head-mounted DBS, we utilize an inductive transcutaneous link to provide sufficient power without size, lifetime, and discomfort of chest-mounted battery-powered traditional DBS. The next step is to adopt aggressive power-management schemes to further improve the DBS efficiency. Current-controlled stimulation (CCS) enables precise charge control and safe operation, but it has low power efficiency due to the dropout voltage across current sources [1,2]. Switched-capacitor stimulation (SCS), proposed in [3], takes advantage of both high efficiency and safety using capacitor banks to transfer charge to the tissue, but it requires an efficient on-chip capacitor charging system, directly from the inductive link. We present an integrated wireless SCS system-on-a-chip with inductive capacitor charging and charge-based stimulation capabilities, which can improve both stimulator (before electrodes) and stimulus (after electrodes) efficiencies in DBS.
AB - Deep-brain stimulation (DBS) has been proven as an effective therapy to alleviate Parkinson's disease, tremor, and dystonia. Towards a less invasive head-mounted DBS, we utilize an inductive transcutaneous link to provide sufficient power without size, lifetime, and discomfort of chest-mounted battery-powered traditional DBS. The next step is to adopt aggressive power-management schemes to further improve the DBS efficiency. Current-controlled stimulation (CCS) enables precise charge control and safe operation, but it has low power efficiency due to the dropout voltage across current sources [1,2]. Switched-capacitor stimulation (SCS), proposed in [3], takes advantage of both high efficiency and safety using capacitor banks to transfer charge to the tissue, but it requires an efficient on-chip capacitor charging system, directly from the inductive link. We present an integrated wireless SCS system-on-a-chip with inductive capacitor charging and charge-based stimulation capabilities, which can improve both stimulator (before electrodes) and stimulus (after electrodes) efficiencies in DBS.
UR - http://www.scopus.com/inward/record.url?scp=84898064835&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898064835&partnerID=8YFLogxK
U2 - 10.1109/ISSCC.2014.6757493
DO - 10.1109/ISSCC.2014.6757493
M3 - Conference contribution
AN - SCOPUS:84898064835
SN - 9781479909186
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 414
EP - 415
BT - 2014 IEEE International Solid-State Circuits Conference, ISSCC 2014 - Digest of Technical Papers
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 61st IEEE International Solid-State Circuits Conference, ISSCC 2014
Y2 - 9 February 2014 through 13 February 2014
ER -