AES E-Library

High-Order Analog Control of a Clocked Class-D Audio Amplifier with Global Feedback Using Z-Domain Methods

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 Import into BibTeX
Subject:Posters: Transducers

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: (CD 131Papers)   /131/8468.pdf

Start a discussion about this paper!