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research article

An offset-enhanced active rectifier with delay compensated active diodes for wirelessly powered biomedical implants

Karimi, Mohammad Javad  
•
Dehollain, Catherine  
•
Schmid, Alexandre  
August 1, 2024
Electronics Letters

This letter presents the design of a 13.56 MHz offset-enhanced full-wave active rectifier, tailored for wirelessly powered biomedical implants. The design incorporates digitally assisted, delay-compensated active diodes and symmetrical bulk biasing in the rectifier core to enhance conduction time, thus improving the voltage conversion ratio (VCR) and power conversion efficiency (PCE). A delay improvement is achieved both in no-load and high-load conditions through an additional comparison path with an offset voltage that is higher than zero. The proposed rectifier is implemented and fabricated in a 180 nm CMOS technology with an area of 0.024 (Formula presented.). The rectifier, tested and measured with inductive links, offers a maximum VCR of 96.4% and a maximum PCE of 89%.

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Type
research article
DOI
10.1049/ell2.13274
Scopus ID

2-s2.0-85200006543

Author(s)
Karimi, Mohammad Javad  

École Polytechnique Fédérale de Lausanne

Dehollain, Catherine  

École Polytechnique Fédérale de Lausanne

Schmid, Alexandre  

École Polytechnique Fédérale de Lausanne

Date Issued

2024-08-01

Published in
Electronics Letters
Volume

60

Issue

15

Article Number

e13274

Subjects

analogue circuits

•

biomedical electronics

•

energy harvesting

•

rectifiers

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PH-STI  
SCI-STI-AXS  
FunderFunding(s)Grant NumberGrant URL

Swiss National Science Foundation

200020‐182548

Available on Infoscience
January 24, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/243521
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