A Class-D Piezoelectric Speaker Driver Using A Quadrature Feedback Chopping Scheme achieving 29dB Large-Signal THD+N Improvement

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Abstract

This paper presents a Class-D piezoelectric speaker driver that employs a quadrature feedback chopping scheme (QCS). Compared to a conventional single feedback chopping scheme (SCS), the use of QCS can eliminate the timing skew between low-voltage (LV) and high-voltage (HV) choppers, greatly improving large-signal linearity. A prototype implemented in a 180nm BCD process achieves a peak THD+N of 88dB/-92.5dB for a 1kHz/6kHz input frequency and 37μ VR MS output noise (A-weighted) while driving a 4μ F load. Thanks to QCS, the large-signal THD+N has been improved by 29 dB, while the output voltage swing achieving -60dB THD+N has been extended from 86.9% to 99.5% of the full-scale (FS).

Original languageEnglish
Title of host publicationProceedings of the 2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023
PublisherIEEE
Number of pages2
ISBN (Electronic)978-4-86348-806-9
ISBN (Print)979-8-3503-4669-5
DOIs
Publication statusPublished - 2023
Event2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023 - Kyoto, Japan
Duration: 11 Jun 202316 Jun 2023

Publication series

NameDigest of Technical Papers - Symposium on VLSI Technology
Volume2023-June
ISSN (Print)0743-1562

Conference

Conference2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023
Country/TerritoryJapan
CityKyoto
Period11/06/2316/06/23

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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