A digital input class-D audio amplifier with sixth-order PWM

被引：1
|
作者：
Luo Shumeng [1 ]
Li Dongmei [2 ]
机构：
[1] Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
JOURNAL OF SEMICONDUCTORS | 2013年 / 34卷 / 11期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
PWM; class-D digital audio; sigma-delta;
D O I：
10.1088/1674-4926/34/11/115001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A digital input class-D audio amplifier with a sixth-order pulse-width modulation (PWM) modulator is presented. This modulator moves the PWM generator into the closed sigma-delta modulator loop. The noise and distortions generated at the PWM generator module are suppressed by the high gain of the forward loop of the sigma-delta modulator. Therefore, at the output of the modulator, a very clean PWM signal is acquired for driving the power stage of the class-D amplifier. A sixth-order modulator is designed to balance the performance and the system clock speed. Fabricated in standard 0.18 mu m CMOS technology, this class-D amplifier achieves 110 dB dynamic range, 100 dB signal-to-noise rate, and 0.0056% total harmonic distortion plus noise.
引用
收藏
页数：6
相关论文
共 50 条
  • [21] An over-current protection circuit for CMOS PWM class-D audio power amplifier applications
    Institute of Microelectronics, Xidian University, Xi'an 710071, China
    Guti Dianzixue Yanjiu Yu Jinzhan, 2008, 2 (271-275):
  • [22] Dynamic power efficiency improvement for PWM class-D amplifier
    Lin, Chun Wei
    Hsieh, Bing Shiun
    IEICE ELECTRONICS EXPRESS, 2013, 10 (06):
  • [23] Class-D Amplifier Power Stage With PWM Feedback Loop
    Lam, Chun Kit
    Tan, Meng Tong
    Cox, Stephen Michael
    Yeo, Kiat Seng
    IEEE TRANSACTIONS ON POWER ELECTRONICS, 2013, 28 (08) : 3870 - 3881
  • [24] A novel control strategy of the class-D stereo audio amplifier
    Cho, Kyu Min
    Oh, Won Seok
    Xu, Hai
    Kim, Hee Jun
    2007 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS, VOLS 1-4, 2007, : 1142 - +
  • [25] An integrated 200-W class-D audio amplifier
    Berkhout, M
    IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2003, 38 (07) : 1198 - 1206
  • [26] Ferrite Bead Effect on Class-D Amplifier Audio Quality
    El Haddad, Kevin
    Mrad, Roberto
    Morel, Florent
    Pillonnet, Gael
    Vollaire, Christian
    Nagari, Angelo
    2014 17TH IEEE MEDITERRANEAN ELECTROTECHNICAL CONFERENCE (MELECON), 2014, : 74 - 78
  • [27] Sliding mode audio class-D amplifier for portable devices
    Pillonnet, Gael
    Cellier, Remy
    Nagari, Angelo
    Lombard, Philippe
    Abouchi, Nacer
    ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 2013, 74 (02) : 439 - 451
  • [28] Sliding mode audio class-D amplifier for portable devices
    Gael Pillonnet
    Remy Cellier
    Angelo Nagari
    Philippe Lombard
    Nacer Abouchi
    Analog Integrated Circuits and Signal Processing, 2013, 74 : 439 - 451
  • [29] Maximising the Efficiency of a Class-D Audio Amplifier Output Stage
    Bakker, Robert
    Duffy, Maeve
    2017 28TH IRISH SIGNALS AND SYSTEMS CONFERENCE (ISSC), 2017,
  • [30] High-Fidelity and High-Efficiency Digital Class-D Audio Power Amplifier
    Wei C.
    Wu J.
    Wei R.
    He M.
    Journal of Electrical and Computer Engineering, 2021, 2021
12345