A High Efficiency and High Power Density Active AC/DC Converter for Battery-Less US-powered IMDs in a 28-nm CMOS Technology | Zendy

Andrea Ballo | Zendy; Alfio Dario Grasso | Zendy; Marco Privitera | Zendy

Open Access

A High Efficiency and High Power Density Active AC/DC Converter for Battery-Less US-powered IMDs in a 28-nm CMOS Technology

Author(s) -

Andrea Ballo,

Alfio Dario Grasso,

Marco Privitera

Publication year - 2024

Publication title -

ieee access

Language(s) - English

Resource type - Journals

ISSN - 2169-3536

DOI - 10.1109/access.2024.3351934

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

In this paper, the design and experimental validation of an active rectifier for ultrasound-based implanted biomedical devices are presented. The circuit is designed by adopting an optimized design procedure based on the g m / I D of the transistors. Implemented in a 28-nm CMOS technology and powered by a 0.5-mm thickness and 1-mm 2 surface area piezoelectric transducer, the rectifier delivers 1-mW of power to the output load. It exhibits a peak power conversion efficiency and a power density equal to 95% and 222 mW/ mm 2 , respectively, revealing itself as the best trade-off between measured power conversion efficiency and power density within the literature of US-powered AC/DC converters.

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