The design of a clocked analog controlled pulse-width modulated class-D audio amplifier with global negative feedback is presented. The analog control loop is designed in the z-domain by modeling the comparator as a sampling operation. A method is presented to improve clip recovery and ensure stability during over-modulation. Loop gain is shaped to provide a high gain across the audio band, and ripple compensation is implemented to minimize the negative effect of ripple feedback. Experimental results are presented.

Authors: Kemp, Pieter; Mouton, Toit; Putzeys, Bruno
Affiliations: Hypex Electronics B.V, Groningen, The Netherlands.; University of Stellenbosch, Matieland, South Africa(See document for exact affiliation information.)
AES Convention: 131 (October 2011) Paper Number: 8468
Publication Date: October 19, 2011 Import into BibTeX
Subject: Posters: Transducers
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=15994

Click to purchase paper as a non-member 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 $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 131Papers)   /131/8468.pdf

Start a discussion about this paper!