title: An 11 μW Sub-pJ/bit Reconfigurable Transceiver for mm-Sized Wireless Implants.
abstract: 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.
authors.forename: Anatoly
authors.initials: A
authors.lastname: Yakovlev
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Jang
authors.forename: Daniel
authors.initials: D
authors.lastname: Pivonka
mesh_terms: D000818:Animals; D017097:Electric Impedance; D004867:Equipment Design; D006801:Humans; D019736:Prostheses and Implants; D013552:Swine; D013686:Telemetry / Q000295:instrumentation*; D059015:Wireless Technology / Q000295:instrumentation*