A capacitor-based AC-DC step-up converter for biomedical implants

Author

Lee, Edward K F

Author_Institution

Alfred Mann Found., Santa Clarita, CA, USA

fYear

2011

fDate

19-21 Sept. 2011

Firstpage

1

Lastpage

4

Abstract

An AC-DC step-up converter architecture for generating multiple compliance voltages (CVs) in an inductive powered biomedical implant is proposed. Switches and active rectifiers are used inside the converter for charging capacitors from the AC input and delivering currents to the loads. Regulated CVs with high power efficiency are obtained by controlling the on/off times of the switches using feedback loops. For a 1MHz, 2.3V peak AC input, a power efficiency of 92.9% for a combined load power of 12.3mW on 4 CVs (±3V and ±3.6V) was achieved in a 0.18μm CMOS process.

Keywords

AC-DC power convertors; CMOS integrated circuits; biomedical electronics; capacitors; feedback; prosthetics; rectifiers; CMOS process; active rectifier; capacitor-based AC-DC step-up converter; charging capacitor; efficiency 92.9 percent; feedback loop; frequency 1 MHz; inductive powered biomedical implant; multiple CV generation; multiple compliance voltage generation; power 12.3 mW; size 0.18 mum; switching rectifier; voltage -3 V; voltage -3.6 V; voltage 2.3 V; voltage 3 V; voltage 3.6 V; Capacitors; Feedback loop; Implants; Rectifiers; Regulators; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2011 IEEE

Conference_Location

San Jose, CA

ISSN

0886-5930

Print_ISBN

978-1-4577-0222-8

Type

conf

DOI

10.1109/CICC.2011.6055373

Filename

6055373