A-121.5 dB THD Class-D Audio Amplifier with 49 dB Suppression of LC Filter Nonlinearity and Robust to +/-30% LC Filter Spread

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Abstract

This paper reports a Class-D audio amplifier that uses multiloop feedback to suppress output LC filter nonlinearity by 49 dB, enabling the use of small, low-cost LC filters with ±30% spread while maintaining low distortion. Fabricated in a 180 nm BCD process, the prototype achieves a THD of-121.5 dB and a THD+N of-107.1 dB. It delivers 12W/21W into an 8-Ω/4-Ω load with 91%/87% efficiency.

Original languageEnglish
Title of host publication2021 Symposium on VLSI Circuits
Place of PublicationPiscataway
PublisherIEEE
Number of pages2
ISBN (Electronic)978-4-86348-780-2
ISBN (Print)978-1-6654-4766-9
DOIs
Publication statusPublished - 2021
Event2021 Symposia on VLSI Technology and VLSI Circuits - Virtual at Kyoto, Japan
Duration: 13 Jun 202119 Jun 2021

Conference

Conference2021 Symposia on VLSI Technology and VLSI Circuits
Country/TerritoryJapan
CityVirtual at Kyoto
Period13/06/2119/06/21

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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