DocumentCode
33203
Title
Integrated Pop-Click Noise Suppression, EMI Reduction, and Short-Circuit Detection for Class-D Audio Amplifiers
Author
Jiang, Xinyang ; Song, Jian ; Wang, Michael ; Chen, Jiann-Jong ; Arunachalam, Sasi Kumar
Author_Institution
Broadcom Corporation, Irvine, CA, USA
Volume
48
Issue
4
fYear
2013
fDate
Apr-13
Firstpage
1099
Lastpage
1108
Abstract
Circuit techniques that overcome practical noise, reliability, and EMI limitations are reported. An auxiliary loop with ramping circuits suppresses pop-and-click noise to 1 mV for an amplifier with 4 V-achievable output voltage. Switching edge rate control enables the system to meet the EN55022 Class-B standard with a 15 dB margin. An enhanced scheme detects short-circuit conditions without relying on overlimit current events.
Keywords
Batteries; Electromagnetic interference; Logic gates; Noise; Pulse width modulation; Resistors; Switches; Audio class-D amplifier; auxiliary driver; auxiliary loop; electromagnetic compatibility; electromagnetic interference; pop-and-click noise; ramping circuit; short-circuit detection; switching edge rate control;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.2013.2238999
Filename
6423218
Link To Document