A Class-D output bridge with dynamic dead-time, small delay and reduced EMI

Timucin David Karaca, Mario Auer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Power efficient Class-D audio amplifiers are very popular in mobile applications, despite the potential electromagnetic interference (EMI) caused by their output stage. Going to higher power levels, more effort has to be put into the reduction of EMI without sacrificing audio performance and efficiency. This work presents a Class-D output stage with an adaptive driver concept. The proposed driver monitors each output transition and dynamically adjusts dead-time and driver strength to reduce EMI while maintaining high audio fidelity. The presented concept is implemented in a 180nm CMOS technology and verified by measurement.
Original languageEnglish
Title of host publicationIEEE International Symposium on Circuits and Systems (ISCAS)
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Electronic)978-1-4673-6853-7
Publication statusPublished - 2017
EventIEEE International Symposium on Circuits and Systems - Baltimore, United States
Duration: 28 May 201731 May 2017

Conference

ConferenceIEEE International Symposium on Circuits and Systems
Abbreviated titleISCAS
CountryUnited States
CityBaltimore
Period28/05/1731/05/17

Fields of Expertise

  • Information, Communication & Computing

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