A power- and area-efficient integrated power management system for inductively-powered biomedical implants

Author

Zhang, Xiwen ; Lee, Hoi ; Guo, Song

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA

fYear

2011

fDate

10-12 Nov. 2011

Firstpage

213

Lastpage

216

Abstract

This paper presents an integrated power management unit (PMU) to improve the power and area efficiencies of the transcutaneous power transmission in biomedical implants. An auto-reconfigurable multi-ratio SC DC-DC regulator is developed within the PMU not only to maintain high system power efficiency under coupling variations but also to reduce the number of required capacitors and power transistors in the system. Implemented in a 0.35-μm CMOS process, the PMU can take an AC input with the signal amplitude of 1.9 V - 3.5 V and provide a regulated output voltage of 4 V. Simulation results show that the proposed PMU can deliver a maximum output current of 10 mA and achieve the peak power efficiency of 83%.

Keywords

CMOS integrated circuits; inductive power transmission; power MOSFET; power capacitors; prosthetic power supplies; CMOS process; PMU; area-efficient integrated power management system; autoreconfigurable multiratio SC DC-DC regulator; capacitors; inductively-powered biomedical implants; integrated power management unit; power efficiency; power transistors; power-efficient integrated power management system; transcutaneous power transmission; Capacitors; Implants; Phasor measurement units; Power transistors; Rectifiers; Regulators; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems Conference (BioCAS), 2011 IEEE

Conference_Location

San Diego, CA

Print_ISBN

978-1-4577-1469-6

Type

conf

DOI

10.1109/BioCAS.2011.6107765

Filename

6107765