PMID- 25667358
OWN - NLM
STAT- MEDLINE
DCOM- 20161213
LR  - 20161230
IS  - 1940-9990 (Electronic)
IS  - 1932-4545 (Linking)
VI  - 10
IP  - 1
DP  - 2016 Feb
TI  - A Triple-Loop Inductive Power Transmission System for Biomedical Applications.
PG  - 138-48
LID - 10.1109/TBCAS.2014.2376965 [doi]
AB  - A triple-loop wireless power transmission (WPT) system equipped with closed-loop 
      global power control, adaptive transmitter (Tx) resonance compensation (TRC), and 
      automatic receiver (Rx) resonance tuning (ART) is presented. This system not only 
      opposes coupling and load variations but also compensates for changes in the 
      environment surrounding the inductive link to enhance power transfer efficiency 
      (PTE) in applications such as implantable medical devices (IMDs). The Tx was 
      built around a commercial off-the-shelf (COTS) radio-frequency identification 
      (RFID) reader, operating at 13.56 MHz. A local Tx loop finds the optimal 
      capacitance in parallel with the Tx coil by adjusting a varactor. A global power 
      control loop maintains the received power at a desired level in the presence of 
      changes in coupling distance, coil misalignments, and loading. Moreover, a local 
      Rx loop is implemented inside a power management integrated circuit (PMIC) to 
      avoid PTE degradation due to the Rx coil surrounding environment and process 
      variations. The PMIC was fabricated in a 0.35- mum 4M2P standard CMOS process with 
      2.54 mm(2) active area. Measurement results show that the proposed triple-loop 
      system improves the overall PTE by up to 10.5% and 4.7% compared to a similar 
      open- and single closed-loop system, respectively, at nominal coil distance of 2 
      cm. The added TRC and ART loops contribute 2.3% and 1.4% to the overall PTE of 
      13.5%, respectively. This is the first WPT system to include three loops to 
      dynamically compensate for environment and circuit variations and improve the 
      overall power efficiency all the way from the driver output in Tx to the load in 
      Rx.
FAU - Lee, Byunghun
AU  - Lee B
FAU - Kiani, Mehdi
AU  - Kiani M
FAU - Ghovanloo, Maysam
AU  - Ghovanloo M
LA  - eng
GR  - 5R21EB009437/EB/NIBIB NIH HHS/United States
GR  - R42NS055430/NS/NINDS NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20150204
PL  - United States
TA  - IEEE Trans Biomed Circuits Syst
JT  - IEEE transactions on biomedical circuits and systems
JID - 101312520
SB  - IM
MH  - Electronics, Medical/instrumentation
MH  - Equipment Design
MH  - *Prostheses and Implants
MH  - Radio Frequency Identification Device/*methods
MH  - Signal Processing, Computer-Assisted/instrumentation
MH  - Telemetry/instrumentation
MH  - Wireless Technology/instrumentation
EDAT- 2015/02/11 06:00
MHDA- 2016/12/15 06:00
CRDT- 2015/02/11 06:00
PHST- 2015/02/11 06:00 [entrez]
PHST- 2015/02/11 06:00 [pubmed]
PHST- 2016/12/15 06:00 [medline]
AID - 10.1109/TBCAS.2014.2376965 [doi]
PST - ppublish
SO  - IEEE Trans Biomed Circuits Syst. 2016 Feb;10(1):138-48. doi: 
      10.1109/TBCAS.2014.2376965. Epub 2015 Feb 4.