A Self-Oscillating Class D Audio Amplifier with Dual Voltage and Current Feedback

被引：0
|
作者：
Nashit, Salma [1 ]
Adrian, Victor [1 ]
Cui, Keer [1 ]
Quoc-An Mai [1 ]
Gwee, Bah-Hwee [1 ]
Chang, Joseph S. [1 ]
机构：
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore
来源：
2014 14TH INTERNATIONAL SYMPOSIUM ON INTEGRATED CIRCUITS (ISIC) | 2014年
关键词：
Class D; audio amplifiers; hysteretic comparator; self-oscillating; Pulse Width Modulation;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We propose a self-oscillating PWM Class D audio amplifier with dual voltage and current feedback. The voltage feedback is taken after the output filter to mitigate any negative effects of the output filter. The current feedback is employed to mitigate the switching ripple voltage and its associated power dissipation. Simulation results using discrete components show that the proposed amplifier achieves the lowest THD+N of 0.04 % at 25 mW output power, and a maximum power efficiency of 94 % at 1.7 W output power with a THD+N of 1.18 %.
引用
收藏
页码：480 / 483
页数：4
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