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Title: A sigma-delta class D audio power amplifier in 0.35μm CMOS technology
Authors: Junle, P. 
Libin, Y. 
Yong, L. 
Keywords: Σ modulation
1.5bit quantization
Issue Date: 2008
Citation: Junle, P.,Libin, Y.,Yong, L. (2008). A sigma-delta class D audio power amplifier in 0.35μm CMOS technology. 2008 International SoC Design Conference, ISOCC 2008 1 : I5-I8. ScholarBank@NUS Repository.
Abstract: This paper presents a single chip class D audio power amplifier realized in a 0.35μm CMOS technology. This chip consists of a high-linear single-loop feed-forward Sigma-Delta modulator with three level quantizer and a full H-bridge output stage. The three-level quantizer effectively reduces the switching activity of the output stage, especially when the input signal amplitude is low, hence improves the power efficiency. Direct feedback from H-bridge output improves the linearity of the amplifier. With a 3.3-V supply voltage and 4-Ohm load, the amplifier can deliver maximum 1-W output power with THD less than 0.8% at 8kHz and reaches a maximum power efficiency more than 80%. ©2008 IEEE.
Source Title: 2008 International SoC Design Conference, ISOCC 2008
ISBN: 9781424425990
DOI: 10.1109/SOCDC.2008.4815561
Appears in Collections:Staff Publications

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