標題: A Low-THD Class-D Audio Amplifier With Dual-Level Dual-Phase Carrier Pulsewidth Modulation
作者: Yang, Shang-Hsien
Yang, Yuan-Han
Chen, Ke-Horng
Lin, Ying-Hsi
Tsai, Tsung-Yen
Lin, Shian-Ru
Lee, Chao-Cheng
資訊工程學系
電機工程學系
Department of Computer Science
Department of Electrical and Computer Engineering
關鍵字: Class-D;dual-level dual-phase carrier (DLDPC);dual-level dual-phase carrier (DLDPC) PWM;intermodulation (IMD);multilevel carrier pulsewidth modulation (MLCPWM);phase-shifted carrier pulsewidth modulation (PSCPWM);total harmonic distortion (THD)
公開日期: 1-Nov-2015
摘要: In this paper, a class-D audio amplifier which combines the advantages of the phase-shifted carrier pulse-width modulation (PWM) and the multiple-level carrier PWM is proposed with a dual-level dual-phase carrier (DLDPC) PWM. The proposed closed-loop amplifier includes a second-order integrator and a DLDPC triangular wave generator. Two sets of 180. out-of-phase triangular waves are used as carriers, and each set has its respective offset voltage level with nonoverlapping amplitude. By performing the double Fourier analysis, it can be found that the linearity can be enhanced and the distortion can be reduced with the proposed modulation. Experimental results show that the proposed fully differential DLDPC PWM class-D audio amplifier features a total harmonic distortion lower than 0.01% with an output voltage swing of +/- 5 V.
URI: http://dx.doi.org/10.1109/TIE.2015.2448518
http://hdl.handle.net/11536/128401
ISSN: 0278-0046
DOI: 10.1109/TIE.2015.2448518
期刊: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume: 62
Issue: 11
起始頁: 7181
結束頁: 7190
Appears in Collections:Articles