A 0.028% THD+N, 91% power-efficiency, 3-level PWM Class-D amplifier with a true differential front-end

@article{Kwon2012A0T,
  title={A 0.028% THD+N, 91% power-efficiency, 3-level PWM Class-D amplifier with a true differential front-end},
  author={Sunwoo Kwon and Injeong Kim and Shinyoung Yi and Sangheyub Kang and Sangheon Lee and Taeho Hwang and Byoungkwon Moon and Yunyoung Choi and Hosung Sung and Jinseok Koh},
  journal={2012 IEEE International Solid-State Circuits Conference},
  year={2012},
  pages={96-98}
}
A Class-D amplifier (CDA) is best suitable for audio mobile applications due to its high-power efficiency, thus enabling to remove a bulky heat sink. A traditional Class-D amplifier uses a 2-level output switching scheme. There typically exist an external LC filter and a bulky capacitor to block a DC average current and to protect the speaker from the current, which increases the bill of materials. As a remedy, a 3-level switching scheme allows to eliminate the filters, hence helping to reduce… CONTINUE READING

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