title: Ultra-low-power wireless transmitter for neural prostheses with modified pulse position modulation.
abstract: An ultra-low-power wireless transmitter for embedded bionic systems is proposed, which achieves 40 pJ/b energy efficiency and delivers 500 kb/s data using the medical implant communication service frequency band (402-405 MHz). It consumes a measured peak power of 200 µW from a 1.2 V supply while occupying an active area of 0.0016 mm(2) in a 130 nm technology. A modified pulse position modulation technique called saturated amplified signal is proposed and implemented, which can reduce the overall and per bit transferred power consumption of the transmitter while reducing the complexity of the transmitter architectures, and hence potentially shrinking the size of the implemented circuitry. The design is capable of being fully integrated on single-chip solutions for surgically implanted bionic systems, wearable devices and neural embedded systems.
authors.affiliation: Department of Electrical and Electronic Engineering , University of Melbourne , Melbourne , Victoria 3010 , Australia ; Victoria Research Laboratory , National ICT Australia (NICTA) , Melbourne , Victoria 3010 , Australia.
authors.forename: Farhad
authors.initials: F
authors.lastname: Goodarzy
authors.affiliation: Department of Electrical and Electronic Engineering , University of Melbourne , Melbourne , Victoria 3010 , Australia ; Victoria Research Laboratory , National ICT Australia (NICTA) , Melbourne , Victoria 3010 , Australia.
authors.forename: Stan E
authors.initials: SE
authors.lastname: Skafidas
keywords: Medical Implant Communication Service frequency band; biomedical telemetry; bit rate 500 kbit/s; circuitry size; embedded bionic systems; embedded systems; energy efficiency; frequency 402 MHz to 405 MHz; modified pulse position modulation technique; neural embedded systems; neural prostheses; neurophysiology; overall transferred power consumption; per bit transferred power consumption; power 200 muW; prosthetics; pulse modulation; saturated amplified signal; single-chip solutions; size 130 nm; surgery; surgically implanted bionic systems; transmitter architecture complexity; transmitters; ultralow-power wireless transmitter; voltage 1.2 V; wearable devices; wireless sensor networks