An active rectifier/regulator combo circuit for powering biomedical implants

Author

Lee, Edward K. F.

Author_Institution

Alfred Mann Found., Santa Clarita, CA, USA

fYear

2013

fDate

22-25 Sept. 2013

Firstpage

1

Lastpage

4

Abstract

A circuit that combines an active rectifier and a linear regulator, which will be referred to as a rectulator, is proposed in this paper. The main transistor in the rectulator is used for both the rectification of the AC input (V_AC) and the regulation of the DC output (V_O) to reduce the overall voltage drop between V_AC and V_O. The rectulator has a high power efficiency (η_P) and very good amplitude modulation (AM) rejection on V_AC against AC field strength variations. A full-wave rectulator implemented in a 0.18μm CMOS process showed an AM rejection > 45dB for an AM frequency <; 2kHz. A η_P of 90.7% was measured for an input frequency of 5MHz, V_O = 2.5V and an output power of 10.5mW.

Keywords

CMOS integrated circuits; controllers; prosthetic power supplies; rectifiers; AC input; DC output; active rectifier circuit; active regulator circuit; amplitude modulation rejection; biomedical implants; field strength variations; frequency 5 MHz; high power efficiency; linear regulator; power 10.5 mW; rectulator; size 0.18 mum; voltage 2.5 V; Biomedical measurement; Implants; Rectifiers; Regulators; Switches; Transistors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference (CICC), 2013 IEEE

Conference_Location

San Jose, CA

Type

conf

DOI

10.1109/CICC.2013.6658446

Filename

6658446