An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission

Hyung Min Lee; Maysam Ghovanloo

doi:10.1109/TCSII.2012.2204840

An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission

Hyung Min Lee, Maysam Ghovanloo

Research output: Contribution to journal › Article › peer-review

63 Citations (Scopus)

Abstract

We present an adaptive reconfigurable active voltage doubler (VD)/rectifier (REC) (VD/REC) in standard CMOS, which can adaptively change its topology to either a VD or a REC by sensing the output voltage, leading to more robust inductive power transmission over an extended range. Both active VD and REC modes provide much lower dropout voltage and far better power conversion efficiency (PCE) compared to their passive counterparts by adopting offset-controlled high-speed comparators that drive the rectifying switches at proper times in the high-frequency band. We have fabricated the active VD/REC in a 0.5-μm 3-metal 2-poly CMOS process, occupying 0.585 mm² of chip area. In an exemplar setup, VD/REC extended the power transmission range by 33% (from 6 to 8 cm) in relative coil distance and 41.5% (from 53° to 75°) in relative coil orientation compared to using the REC alone. While providing 3.1-V dc output across a 500-$\Omega$ load from 2.15- (VD) and 3.7-V (REC) peak ac inputs at 13.56 MHz, VD/REC achieved measured PCEs of 70% and 77%, respectively.

Original language	English
Article number	6236106
Pages (from-to)	481-485
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	59
Issue number	8
DOIs	https://doi.org/10.1109/TCSII.2012.2204840
Publication status	Published - 2012
Externally published	Yes

Bibliographical note

Funding Information:
Manuscript received January 30, 2012; revised May 23, 2012; accepted June 12, 2012. Date of publication July 10, 2012; date of current version August 10, 2012. This work was supported in part by the National Institutes of Health under Grants 1R01NS062031 and 5R21EB009437 and in part by the National Science Foundation under Award ECCS-824199. This brief was recommended by Associate Editor G. Wang.

Keywords

Active rectifier (REC)
active voltage doubler (VD)
adaptive control
high-speed comparators
implantable microelectronic devices (IMDs)
inductive power transmission
near field

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/TCSII.2012.2204840

Cite this

@article{946400cfc2f5406d8e1be950e975984b,

title = "An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission",

abstract = "We present an adaptive reconfigurable active voltage doubler (VD)/rectifier (REC) (VD/REC) in standard CMOS, which can adaptively change its topology to either a VD or a REC by sensing the output voltage, leading to more robust inductive power transmission over an extended range. Both active VD and REC modes provide much lower dropout voltage and far better power conversion efficiency (PCE) compared to their passive counterparts by adopting offset-controlled high-speed comparators that drive the rectifying switches at proper times in the high-frequency band. We have fabricated the active VD/REC in a 0.5-μm 3-metal 2-poly CMOS process, occupying 0.585 mm2 of chip area. In an exemplar setup, VD/REC extended the power transmission range by 33% (from 6 to 8 cm) in relative coil distance and 41.5% (from 53° to 75°) in relative coil orientation compared to using the REC alone. While providing 3.1-V dc output across a 500-$\Omega$ load from 2.15- (VD) and 3.7-V (REC) peak ac inputs at 13.56 MHz, VD/REC achieved measured PCEs of 70% and 77%, respectively.",

keywords = "Active rectifier (REC), active voltage doubler (VD), adaptive control, high-speed comparators, implantable microelectronic devices (IMDs), inductive power transmission, near field",

author = "Lee, {Hyung Min} and Maysam Ghovanloo",

note = "Funding Information: Manuscript received January 30, 2012; revised May 23, 2012; accepted June 12, 2012. Date of publication July 10, 2012; date of current version August 10, 2012. This work was supported in part by the National Institutes of Health under Grants 1R01NS062031 and 5R21EB009437 and in part by the National Science Foundation under Award ECCS-824199. This brief was recommended by Associate Editor G. Wang.",

year = "2012",

doi = "10.1109/TCSII.2012.2204840",

language = "English",

volume = "59",

pages = "481--485",

journal = "IEEE Transactions on Circuits and Systems II: Express Briefs",

issn = "1549-7747",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "8",

}

TY - JOUR

T1 - An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission

AU - Lee, Hyung Min

AU - Ghovanloo, Maysam

N1 - Funding Information: Manuscript received January 30, 2012; revised May 23, 2012; accepted June 12, 2012. Date of publication July 10, 2012; date of current version August 10, 2012. This work was supported in part by the National Institutes of Health under Grants 1R01NS062031 and 5R21EB009437 and in part by the National Science Foundation under Award ECCS-824199. This brief was recommended by Associate Editor G. Wang.

PY - 2012

Y1 - 2012

N2 - We present an adaptive reconfigurable active voltage doubler (VD)/rectifier (REC) (VD/REC) in standard CMOS, which can adaptively change its topology to either a VD or a REC by sensing the output voltage, leading to more robust inductive power transmission over an extended range. Both active VD and REC modes provide much lower dropout voltage and far better power conversion efficiency (PCE) compared to their passive counterparts by adopting offset-controlled high-speed comparators that drive the rectifying switches at proper times in the high-frequency band. We have fabricated the active VD/REC in a 0.5-μm 3-metal 2-poly CMOS process, occupying 0.585 mm2 of chip area. In an exemplar setup, VD/REC extended the power transmission range by 33% (from 6 to 8 cm) in relative coil distance and 41.5% (from 53° to 75°) in relative coil orientation compared to using the REC alone. While providing 3.1-V dc output across a 500-$\Omega$ load from 2.15- (VD) and 3.7-V (REC) peak ac inputs at 13.56 MHz, VD/REC achieved measured PCEs of 70% and 77%, respectively.

AB - We present an adaptive reconfigurable active voltage doubler (VD)/rectifier (REC) (VD/REC) in standard CMOS, which can adaptively change its topology to either a VD or a REC by sensing the output voltage, leading to more robust inductive power transmission over an extended range. Both active VD and REC modes provide much lower dropout voltage and far better power conversion efficiency (PCE) compared to their passive counterparts by adopting offset-controlled high-speed comparators that drive the rectifying switches at proper times in the high-frequency band. We have fabricated the active VD/REC in a 0.5-μm 3-metal 2-poly CMOS process, occupying 0.585 mm2 of chip area. In an exemplar setup, VD/REC extended the power transmission range by 33% (from 6 to 8 cm) in relative coil distance and 41.5% (from 53° to 75°) in relative coil orientation compared to using the REC alone. While providing 3.1-V dc output across a 500-$\Omega$ load from 2.15- (VD) and 3.7-V (REC) peak ac inputs at 13.56 MHz, VD/REC achieved measured PCEs of 70% and 77%, respectively.

KW - Active rectifier (REC)

KW - active voltage doubler (VD)

KW - adaptive control

KW - high-speed comparators

KW - implantable microelectronic devices (IMDs)

KW - inductive power transmission

KW - near field

UR - http://www.scopus.com/inward/record.url?scp=84865348665&partnerID=8YFLogxK

U2 - 10.1109/TCSII.2012.2204840

DO - 10.1109/TCSII.2012.2204840

M3 - Article

AN - SCOPUS:84865348665

SN - 1549-7747

VL - 59

SP - 481

EP - 485

JO - IEEE Transactions on Circuits and Systems II: Express Briefs

JF - IEEE Transactions on Circuits and Systems II: Express Briefs

IS - 8

M1 - 6236106

ER -

An adaptive reconfigurable active voltage doubler/rectifier for extended-range inductive power transmission

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this