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

Conference paper (2021)

Authors

H. Zhang Electronic Instrumentation - EEMCS
M. Berkhout Goodix Technology
K.A.A. Makinwa Microelectronics
Q. Fan Electronic Instrumentation - EEMCS
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: © 2021 H. Zhang, M. Berkhout, K.A.A. Makinwa, Q. Fan
DOI: https://doi.org/10.23919/VLSICircuits52068.2021.9492441
More Info
expand_more

Published Date

2021

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

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.

Files

LC_VLSI2021_v11.pdf
(pdf | 1.45 Mb)

Download not available

A_121.5_dB_THD_Class_D_Audio_A... (pdf)
(pdf | 2.83 Mb)
- Embargo expired in 25-03-2022