Volume 8 Number 2 (Feb. 2013)
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JSW 2013 Vol.8(2): 488-495 ISSN: 1796-217X
doi: 10.4304/jsw.8.2.488-495

The Correction Method for Power Noise in Digital Class D Power Amplifiers

Hui Feng1, Zeqi Yu2
1VLSI Institute, Tongji University, ShangHai, China
2School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China

Abstract—In a digital class D power amplifier, the distortion is introduced into the input signal being amplified in power stage, due to the effect of power supply noise. A method used to eliminate the distortion is presented in the paper. This method is adding correction factors to all integrators of Delta-Sigma modulator, and introducing power supply noise to the input of the class D power amplifier and Delta-Sigma modulator. A design example with the method is presented, and the simulation results indicate this method can eliminate the error introduced by power stage.

Index Terms—power stage, power supply noise, Delta-Sigma modulator, digital class D power amplifier, PWM.

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Cite: Hui Feng, Zeqi Yu, "The Correction Method for Power Noise in Digital Class D Power Amplifiers," Journal of Software vol. 8, no. 2, pp. 488-495, 2013.

General Information

ISSN: 1796-217X (Online)
Frequency:  Bimonthly 
Editor-in-Chief: Prof. Antanas Verikas
Executive Editor: Ms. Yoyo Y. Zhou
Abstracting/ Indexing: DBLP, EBSCO, CNKIGoogle Scholar, ProQuest, INSPEC(IET), ULRICH's Periodicals Directory, WorldCat, etc
E-mail: jsw@iap.org
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