An 11 μW Sub-pJ/bit Reconfigurable Transceiver for mm-Sized Wireless Implants

A wirelessly powered 11 μW transceiver for implantable devices has been designed and demonstrated through 35 mm of porcine heart tissue. The prototype was implemented in 65 nm CMOS occupying 1 mm × 1 mm with a 2 mm × 2 mm off-chip antenna. The IC consists of a rectifier, regulator, demodulator, modu...

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Bibliographic Details
Published inIEEE transactions on biomedical circuits and systems Vol. 10; no. 1; pp. 175 - 185
Main Authors Yakovlev, Anatoly, Jang, Ji Hoon, Pivonka, Daniel
Format Journal Article
LanguageEnglish
Published United States 01.02.2016
Subjects
Animals
Electric Impedance
Equipment Design
Humans
Prostheses and Implants
Swine
Telemetry - instrumentation
Wireless Technology - instrumentation
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Summary:A wirelessly powered 11 μW transceiver for implantable devices has been designed and demonstrated through 35 mm of porcine heart tissue. The prototype was implemented in 65 nm CMOS occupying 1 mm × 1 mm with a 2 mm × 2 mm off-chip antenna. The IC consists of a rectifier, regulator, demodulator, modulator, controller, and sensor interface. The forward link transfers power and data on a 1.32 GHz carrier using low-depth ASK modulation that minimizes impact on power delivery and achieves from 4 to 20 Mbps with 0.3 pJ/bit at 4 Mbps. The backscattering link modulates the antenna impedance with a configurable load for operation in diverse biological environments and achieves up to 2 Mbps at 0.7 pJ/bit. The device supports TDMA, allowing for operation of multiple devices from a single external transceiver.
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ISSN:1940-9990
DOI:10.1109/TBCAS.2014.2371031