Fast switching charge dump assisted Class-D audio amplifier with high fidelity and high efficiency

null Kwang-Chan Lee; null Chang-Seok Chae; null Kang-Ho Lee; null Gyu-Hyeong Cho

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https://doi.org/10.1...arrow_drop_down

https://doi.org/10.1109/pesc.2...

Article . 2008 . Peer-reviewed

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https://dx.doi.org/10.1109/pes...

Article

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Fast switching charge dump assisted Class-D audio amplifier with high fidelity and high efficiency

descriptionPublicationkeyboard_double_arrow_right Article 01 Jun 2008Publisher:IEEEJournal:2008 IEEE Power Electronics Specialists Conference (issn: 0275-9306,

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Authors: null Kwang-Chan Lee; null Chang-Seok Chae; null Kang-Ho Lee; null Gyu-Hyeong Cho;

doi: 10.1109/pesc.2008.4592498

Fast switching charge dump assisted Class-D audio amplifier with high fidelity and high efficiency

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Abstract

A fast switching charge dump assisted class-D audio amplifier is presented in this paper. To achieve high efficiency and high linearity, the Class-K* audio amplifier consists of the class D amplifier with high efficiency and the proposed charge dump amplifier with high linearity. The charge pump amplifier works at faster switching frequency than class D amplifier so as to compensate the distortion caused by switching of the class-D amplifier. The class-K* audio amplifier implemented in 0.35mum CMOS process shows -71.8 dB THD+N at 1 KHz and a maximum efficiency of 81% at an output power of 257 mW for 4.1Omega load.

Related Organizations

Korea Advanced Institute of Science and Technology
Korea (Republic of)

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