AES Store

Journal Forum

Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
4 comments

Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
9 comments

New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
1 comment

Access Journal Forum

AES E-Library

Digital-Input Class-D Audio Amplifier

Not only digital-input class-D audio amplifier directly converts digital PCM-coded audio signal into power, it also exhibits superior performances with respect to traditional PWM analog class-D amplifiers. In the later, several analog techniques have to be deployed to combat the many side-effects inherent to analog blocks, resulting in complex circuitry. Digital domain provides many degrees of freedom that allow combating signal non-idealities with no or just little extra cost. As the output to the real world is analog, digital class-D amplifier requires Analog to Digital Conversion (ADC) in feedback to compensate for Jitter, signal distortions and power supply noise. With careful sigma delta modulation design and few digital techniques, the class-D loop is stabilized and achieves superior audio performances. The audio signal cascade chain is tremendously simplified resulting in significant reduction in area cost and power consumption. For applications that require analog input processing, the digital class-D still accepts analog inputs with no extra cost.

Authors:
Affiliation:
AES Convention: Paper Number:
Publication Date:
Subject:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!


 
Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society