THD of Closed-Loop Analog PWM Class-D Amplifiers

@article{Shu2008THDOC,
  title={THD of Closed-Loop Analog PWM Class-D Amplifiers},
  author={Wei Shu and Joseph Sylvester Chang},
  journal={IEEE Transactions on Circuits and Systems I: Regular Papers},
  year={2008},
  volume={55},
  pages={1769-1777}
}
This paper presents an analytical modeling of the mechanisms of total harmonic distortion (THD) of second-order based single-feedback and double-feedback class-D amplifiers (CDAs). We show that the overall THD in these closed-loop CDAs comprises the THD of their open-loop counterparts reduced by the Loop Gain+1 and the THD due to the combined phase and duty cycle error that is due to feedback, hence unique to closed-loop CDAs. We show that the latter THD can be large and is the dominant THD at… CONTINUE READING
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2 W BTL single-chip CDA with very high efficiency for audio applications

  • J. W. Lee, J. S. Lee, G. S. Lee, S. A. Kim
  • Proc. ISCAS, 2000, vol. 5, pp. 493–496.
  • 2000
Highly Influential
13 Excerpts

The truth about digital (Class-D) amplifiers

  • B. Putzeys
  • AudioHolics Online A/V Mag. Aug. 2004.
  • 2004
1 Excerpt

An investigation on the parameters affecting total harmonic distortion in a CDA

  • M. T. Tan, J. S. Chang, H. C. Chua, B. H. Gwee
  • IEEE Trans. Circuits Syst. I, Fundam. Theory Appl…
  • 2003
2 Excerpts

Analysis and design of power efficient Class-D amplifier output stages

  • J. S. Chang, M. T. Tan, Z. Cheng, Y. C. Tong
  • IEEE Trans. Circuits Syst. I, Fundam. Theory Appl…
  • 2000
1 Excerpt

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