Open AccessUltra‐low‐power wireless transmitter for neural prostheses with modified pulse position modulation
Author(s) -
Goodarzy Farhad,
Skafidas Stan E.
Publication year - 2014
Publication title -
healthcare technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 19
ISSN - 2053-3713
DOI - 10.1049/htl.2013.0012
Subject(s) - transmitter , wireless , neural prosthesis , modulation (music) , computer science , power (physics) , pulse position modulation , position (finance) , electrical engineering , pulse (music) , pulse amplitude modulation , telecommunications , biomedical engineering , acoustics , engineering , physics , channel (broadcasting) , finance , detector , economics , quantum mechanics
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.