Title :
A 11μW Sub-pJ/bit reconfigurable transceiver for mm-sized wireless implants
Author :
Yakovlev, Alex ; Jihoon Jang ; Pivonka, Daniel ; Poon, Alan
Author_Institution :
Stanford Univ., Stanford, CA, USA
Abstract :
A wirelessly powered 11 μW transceiver for implantable sensors has been designed and demonstrated through 35 mm of porcine heart tissue. The prototype occupies 1 mm × 1 mm in 65nm CMOS with an external receive 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 2 Mbps at 0.7 pJ/bit. The device supports TDMA, allowing for simultaneous operation of multiple sensors.
Keywords :
CMOS integrated circuits; UHF antennas; UHF detectors; UHF integrated circuits; amplitude shift keying; biological tissues; biomedical transducers; cardiology; electric sensing devices; prosthetic power supplies; radio transceivers; receiving antennas; sensor fusion; wireless sensor networks; CMOS technology; IC; TDMA; backscattering link modulation; biological environment; bit rate 2 Mbit/s; bit rate 4 Mbit/s to 20 Mbit/s; controller; demodulator; external receive antenna impedance; forward link power transfer; frequency 1.32 GHz; low-depth ASK modulation; mm-sized wireless implantable sensor; modulator; multiple sensor operation; porcine heart tissue; power 11 muW; rectifier; regulator; size 35 mm; size 65 nm; sub-pJ-bit reconfigurable transceiver; wirelessly powered transceiver; Backscatter; Clocks; Integrated circuits; Loaded antennas; Sensors; Transceivers;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2013 IEEE
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2013.6658501
