TY - GEN
T1 - Design of Multiple-Charge-Pump System for Implantable Biomedical Applications
AU - Lin, Shiau Pin
AU - Ker, Ming-Dou
PY - 2018/10/17
Y1 - 2018/10/17
N2 - Circuit design to implement a multiple-charge-pump (MCP) system in a low-voltage standard CMOS process is proposed, that can successfully support the desired power sources for implantable monopolar biphasic stimulator. A negative charge pump (CP) circuit with the four-phase cross-couple structure is introduced to suppress return-back leakage, and thus its power efficiency is improved. This MCP system provides the stimulator with three power sources of +9V, -9V, and -2.7V, simultaneously. Closed-loop operation helps for regulating the output voltage sources (+9V and -9V) with a maximum loading current of 5.5mA for stimulus drivers, and 1-MA current for the control circuits of the stimulator. The proposed MCP system has been fabricated in a 0.18-μm 1.8-V /3.3-V CMOS process, as well as successfully verified in in-vivo animal tests with stimulator together.
AB - Circuit design to implement a multiple-charge-pump (MCP) system in a low-voltage standard CMOS process is proposed, that can successfully support the desired power sources for implantable monopolar biphasic stimulator. A negative charge pump (CP) circuit with the four-phase cross-couple structure is introduced to suppress return-back leakage, and thus its power efficiency is improved. This MCP system provides the stimulator with three power sources of +9V, -9V, and -2.7V, simultaneously. Closed-loop operation helps for regulating the output voltage sources (+9V and -9V) with a maximum loading current of 5.5mA for stimulus drivers, and 1-MA current for the control circuits of the stimulator. The proposed MCP system has been fabricated in a 0.18-μm 1.8-V /3.3-V CMOS process, as well as successfully verified in in-vivo animal tests with stimulator together.
KW - High voltage generator
KW - Multiple charge pump
KW - Negative charge pump
KW - Positive charge pump
KW - Power efficiency
UR - http://www.scopus.com/inward/record.url?scp=85060864250&partnerID=8YFLogxK
U2 - 10.1109/BIOCAS.2018.8584758
DO - 10.1109/BIOCAS.2018.8584758
M3 - Conference contribution
AN - SCOPUS:85060864250
T3 - 2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings
BT - 2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018
Y2 - 17 October 2018 through 19 October 2018
ER -