Turner and Slade

Class-D Audio Amplifier Front End Circuit with five-bit digital volume control

ECE 547 “VLSI Design”
Fall Semester 2001
Department of Electrical Engineering
University of Maine

Designed by
Wayne Homer Slade, Jr. and Steven Eugene Turner

Computer chip

Class-D amplifiers are becoming key components of low power modern consumer devices. Their high efficiency makes them ideal audio amplifiers in laptops, cell-phones, subwoofers, and other mobile audio devices. This VLSI project implements the signal processing “front end” component of a class-D amplifier. The inputs to the circuit are stereo line-in audio, and the outputs are designed to drive an H-bridge for each audio channel. Volume control has also been implemented as a five-bit digital number input.

The project report (PDF) contains a description of the project, details of the design and layout, and the test results. A poster (PDF) describing our project is also available.

August 2002

Computer chip