Zhenfei Peng

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A Class-I audio amplifier with an integrated DC/DC converter implemented in 0.18-µm CMOS process is presented. Efficiency is improved by adopting a self-generated adaptive supply, which tracks the audio signal and keeps a small voltage across output transistors. The employed gain compression technique uses only one positive supply to maintain good(More)
The paper describes the design and implementation of a speaker driver applied to Class G/Class I with single phase power supply. Gain expanding and compressing technology are employed in signal processing circuit to optimize power dissipation. Experimental results using 0.18µm N-well CMOS show that it can obtain less than 0.006% THD at low power(More)
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