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Common-mode Stable Multilevel Output Stage with EMI Reduction Feedback Loop for Class-D audio Amplifier by Naoaki Nishimura; Atsushi Matamura; Preston Birdsong; Shaolong Liu; Abhishek Bandyopadhyay; Mariana Markova; Rajeev Morajkar is a scholarly article available to read on EtoBox.

What is Common-mode Stable Multilevel Output Stage with EMI Reduction Feedback Loop for Class-D audio Amplifier about?

This paper presents a differential, multilevel Class-D output stage with stable common-mode, where electromagnetic interference (EMI) is actively reduced by feedback techniques. A ΔΣ headphone Class-D amplifier with the proposed EMI reduction loops has been fabricated in a 40 nm CMOS and reduces conducted EMI by more than 14 dB. The EMI reduction loops consist entirely of internal circuitry and require no additional pins or external passive elements. The loop does not compromise audio performance, achieving 113 dB SNR and -93 dB THD+N with and without EMI reduction, and dissipates only 57 μW out of 1.44 mW amplifier quiescent power.

Author

Naoaki Nishimura; Atsushi Matamura; Preston Birdsong; Shaolong Liu; Abhishek Bandyopadhyay; Mariana Markova; Rajeev Morajkar

Publisher

IEEE

Published

2022

Language

EN