Fundamentals of Audio Class D Amplifier Design: A Review of Schemes and Architectures

Class D amplifiers [1]-[16], or switching amplifiers, are popular components in mixed-signal IC design and widely adopted for smartphones and tablets with rich multimedia, thanks to the high-efficiency and high-output power capability. Their applications range from audio and video drivers to envelope tracking for power amplifiers.

[1]  Jianlong Chen,et al.  Integrated Pop-Click Noise Suppression, EMI Reduction, and Short-Circuit Detection for Class-D Audio Amplifiers , 2013, IEEE Journal of Solid-State Circuits.

[2]  L. Risbo,et al.  A Digital Input Controller for Audio Class-D Amplifiers with 100W 0.004% THD+N and 113dB DR , 2006, 2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers.

[3]  G. Burra,et al.  A 700+-mW class D design with direct battery hookup in a 90-nm process , 2005, IEEE Journal of Solid-State Circuits.

[4]  M. Berkhout.  Integrated overcurrent protection system for class-D audio power amplifiers , 2005, IEEE Journal of Solid-State Circuits.

[5]  Srini Ramaswamy,et al.  A High-Performance Digital-Input Class-D Amplifier with Direct Battery Connection in a 90nm Digital CMOS Process , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[6]  Angelo Nagari,et al.  An 8 $\Omega$ 2.5 W 1%-THD 104 dB(A)-Dynamic-Range Class-D Audio Amplifier With Ultra-Low EMI System and Current Sensing for Speaker Protection , 2012, IEEE Journal of Solid-State Circuits.

[7]  Xicheng Jiang,et al.  A 120 dB Dynamic Range 400 mW Class-D Speaker Driver With Fourth-Order PWM Modulator , 2010, IEEE Journal of Solid-State Circuits.

[8]  Richard K. Hester,et al.  A 20W/channel Class-D amplifier with significantly reduced common-mode radiated emissions , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[9]  Jianlong Chen,et al.  A Low-Power, High-Fidelity Stereo Audio Codec in 0.13 $\mu$m CMOS , 2012, IEEE Journal of Solid-State Circuits.

[10]  Sasi Kumar Arunachalam,et al.  An 8Ω, 1.75W, 95% efficiency, 0.004% THD+N Class-D amplifier with a feed-forward ADC and feedback filters , 2013, 2013 IEEE Asian Solid-State Circuits Conference (A-SSCC).

[11]  Xicheng Jiang,et al.  Digitally-Assisted Analog and Analog-Assisted Digital IC Design , 2015 .

[12]  Vineet Mishra,et al.  45nm CMOS 8Ω Class-D audio driver with 79% efficiency and 100dB SNR , 2010, 2010 IEEE International Solid-State Circuits Conference - (ISSCC).

[13]  Marco Berkhout,et al.  A 4Ω 2.3W class-D audio amplifier with embedded DC-DC boost converter, current-sensing ADC and DSP for adaptive speaker protection , 2013, 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers.

[14]  Jianlong Chen,et al.  Circuit techniques to overcome Class-D audio amplifier limitations in mobile devices , 2012, 2012 Symposium on VLSI Circuits (VLSIC).

[15]  Anthony Gribben,et al.  True Filterless Class-D Audio Amplifier , 2011, IEEE Journal of Solid-State Circuits.

[16]  Jianlong Chen,et al.  A 10mW stereo audio CODEC in 0.13µm CMOS , 2010, 2010 IEEE International Solid-State Circuits Conference - (ISSCC).