A -109.1 dB/-98 dB THD/THD+N Chopper Class-D Amplifier with >83.7 dB PSRR Over the Entire Audio Band

Conference paper (2021)

Authors

Huajun Zhang Electronic Instrumentation
Nuriel N.M. Rozsa Electronic Instrumentation
Marco Berkhout Goodix Technology
Qinwen Fan Electronic Instrumentation
Research Group
Electronic Instrumentation
Copyright: © 2021 H. Zhang, N.N.M. Rozsa, Marco Berkhout, Q. Fan
DOI: https://doi.org/10.1109/ESSCIRC53450.2021.9567786
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.

Research Group

Electronic Instrumentation

Abstract

This paper reports a chopper Class-D audio amplifier that obtains high PSRR over the entire audio band. A chopping scheme is proposed to minimize intermodulation distortion between pulse-width modulation (PWM) and chopping in the audio band. A high-voltage chopper is developed to handle a 14.4 V PWM signal. Timing matching techniques are proposed to minimize chopping nonidealities which ensure good PSRR and THD. Fabricated in a 180nm BCD process, the prototype obtains a PSRR >109 dB at 217 Hz and >83.7 dB over the entire audio band. It also achieves -109.1 dB/-98 dB THD/THD+N and can deliver a maximum of 13 W to an 8-Ω load.

Files

9104.pdf
(pdf | 0.965 Mb)
Unknown license
A_109.1_dB_98_dB_THD_THDN_Chop... (pdf)
(pdf | 1.91 Mb)
Unknown license

Download not available