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Title 13.56MHz Highly-Efficient Power Conditioning Unit using an Active Rectifier and LDO for Implantable Medical Devices (IMD)
Posted by Allenn Lowaton
Authors Berido, Rovil S.; Lowaton, Allenn C.
Publication date March 2019
Journal International Journal of Electrical and Electronic Engineering and Telecommunications
Volume volume 8
Issue Number 2
Pages 84-88
Abstract This paper presents a highly-efficient power conditioning unit using 65nm CMOS technology for inductively-powered Implantable Medical Device (IMD). The unit is comprised of an active rectifier and a Low Drop-Out Regulator (LDO) which together, provides a stable 3V (30mW power) to the IMD (load). The active rectifier is equipped with an integrated offset compensation control in the rectifier comparator. Unlike the work in [6], where offchip signals are necessary for the comparator to work, in this paper all comparator components are integrated on chip. Operating at 13.56MHz frequency and with peak input voltage of 3.6V, the rectifier has high power conversion efficiency (PCE) of 90%. The LDO has also a high PCE of 89%. Together, the rectifier and the LDO, form a high PCE power conditioning unit for a 30mW IMD.
Index terms / Keywords Active Rectifier, LDO, IMD, Inductive Power Transmission, 13.56MHz ISM band
DOI 10.18178/ijeetc.8.2.84-88