DocumentCode
1766015
Title
Integrated Class-D Audio Amplifier With 95% Efficiency and 105 dB SNR
Author
Xicheng Jiang ; Jungwoo Song ; Cheung, Darwin ; Minsheng Wang ; Arunachalam, Sasi Kumar
Author_Institution
Broadcom Corp., Irvine, CA, USA
Volume
49
Issue
11
fYear
2014
fDate
Nov. 2014
Firstpage
2387
Lastpage
2396
Abstract
An integrated ultralow EMI Class-D amplifier with a feed-forward ADC and feedback filters is demonstrated in a 180 nm CMOS and wire-bonded package. Circuit and architecture techniques, which enable 1.75 W into an 8 Ohm speaker, 105 dB SNR, 95% efficiency, 0.004% THD+N, and 15.4 dB margin beyond the EN55022 Class-B standard, are discussed.
Keywords
CMOS integrated circuits; audio-frequency amplifiers; electromagnetic interference; lead bonding; CMOS; Class-D audio amplifier; EMI; EN55022 Class-B standard; feed-forward ADC; feedback filters; power 1.75 W; resistance 8 ohm; size 180 nm; wire-bonded package; Batteries; Frequency modulation; Gain; Noise; Power generation; Pulse width modulation; ADC; EMI; SNR; THD+N; audio; class-D amplifier; efficiency; feed-forward; feedback; filter;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.2014.2335713
Filename
6861459
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