Visualization of intrinsic harmonic distortion for closed-loop Class D amplifier

Author

Yu, Jun ; Goh, Wang Ling ; Tan, Meng Tong

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

fYear

2011

fDate

12-14 Dec. 2011

Firstpage

156

Lastpage

159

Abstract

This paper presents an intuitive approach for analyzing the intrinsic harmonic distortion of a closed-loop Class D amplifier. The cubic spline interpolation was deployed for time domain waveform presentation of the phase and duty cycle errors, to provide an insight view of the distortion that are contained in the output pulse width modulation signal. Furthermore, the relationship between the phase and duty cycle errors and the distortion on the demodulated output signal has been shaped and verified through simulation and comparison with our previous analytical results, to further strengthen our conclusion on their effects on the 3^rd-order harmonic distortion.

Keywords

amplifiers; closed loop systems; harmonic distortion; interpolation; splines (mathematics); time-domain analysis; closed-loop class D amplifier; cubic spline interpolation; demodulated output signal; duty cycle errors; intrinsic harmonic distortion; pulse width modulation signal; time domain waveform presentation; Harmonic analysis; Harmonic distortion; Phase distortion; Pulse width modulation; Time domain analysis; Timing; 2^nd-order loop filter; Class D amplifier; duty cycle error; interpolation; intrinsic harmonic distortion; phase error;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits (ISIC), 2011 13th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-61284-863-1

Type

conf

DOI

10.1109/ISICir.2011.6131901

Filename

6131901