CMOS analog power meter and delay line for automatic efficiency optimization in medical power transmitters

Virgilio Valente, Andreas Demosthenous

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)

Abstract

Inductive powering is an efficient method to wire-lessly transfer power to an implant. On the transmitter side, a power amplifier (class-D or class-E) is used to convert DC power, from a supply unit, into AC power, which can be transferred across the inductive link. At frequencies conventionally used for powering implants, the efficiency of a Class-D power amplifier is highly dependent on the dead time between the switching of the low-side and the high-side switches. Closed-loop techniques can then be adopted to automatically set the appropriate dead time. This paper addresses this issue by presenting the conceptual design of an analog CMOS closed-loop automatic efficiency optimization circuit for class-D PAs, consisting of an analog power meter and a 13-bit programmable delay line. The circuits have been designed in a 0.18μm CMOS technology and simulated using Cadence Spectre.

Original languageEnglish
Title of host publication2013 IEEE 20th International Conference on Electronics, Circuits, and Systems, ICECS 2013
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages249-252
Number of pages4
ISBN (Print)9781479924523
DOIs
Publication statusPublished - 1 Jan 2013
Externally publishedYes
Event2013 IEEE 20th International Conference on Electronics, Circuits, and Systems, ICECS 2013 - Abu Dhabi, United Arab Emirates
Duration: 8 Dec 201311 Dec 2013

Publication series

NameProceedings of the IEEE International Conference on Electronics, Circuits, and Systems

Conference

Conference2013 IEEE 20th International Conference on Electronics, Circuits, and Systems, ICECS 2013
CountryUnited Arab Emirates
CityAbu Dhabi
Period8/12/1311/12/13

Fingerprint Dive into the research topics of 'CMOS analog power meter and delay line for automatic efficiency optimization in medical power transmitters'. Together they form a unique fingerprint.

Cite this