Low distortion digital pulse width modulation for audio class-D amplifier

被引：0
|
作者：
Yoneya, A [1 ]
Watanabe, A [1 ]
机构：
[1] Nagoya Inst Technol, Shikumi Coll, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
IEEE INTERNATIONAL SYMPOSIUM ON COMMUNICATIONS AND INFORMATION TECHNOLOGIES 2004 (ISCIT 2004), PROCEEDINGS, VOLS 1 AND 2: SMART INFO-MEDIA SYSTEMS | 2004年
关键词：
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
A pulse width modulation scheme for a high fidelity digital audio amplifier is presented. The uniform PWM is used to utilize the over sampling technology, but the UPWM causes harmonic distortions. So the harmonic distortion components at the PWM output are estimated using the derivatives of the input signal and cancelled at the input of the delta-sigma modulator. The output signal of the delta-sigma modulator is coarsely quantized with shaped noise and fed to the pulse width modulator. A simulation result for a dual tone test is presented to illustrate the effectiveness of the proposed method.
引用
收藏
页码：515 / 518
页数：4
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