Opens in a new tab

AES E-Library

← Back to search

Convention Paper

Field-Programmable Gate-Array-Based 32-Times Oversampling Eighth-Order Sigma-Delta Audio DAC

Authors: Risbo, Lars

AES Convention 96 · Paper 3808 · February 1994

Abstract

A novel Sigma-Delta based audio DAC system is presented. The converter operates at only 32-times oversampling (1.4 MHz) and uses an eighth-order Sigma-Delta modulator implemented in a single FPGA circuit. Two different DAC circuits have been implemented: One using switched capacitor charge packets and one using nonreturn to zero pulses. A voltage-controlled Xtal oscillator-based PLL ensures low-jitter sampling clock recovery.

Details

Published in
AES Convention 96
AES Convention
96
Paper number
3808
Publication date
February 6, 1994
Session subject
Implementation of Digital Audio Systems
Affiliation
Electronics Institute, Technical University of Denmark, Denmark (See document for exact affiliation information.)
Type
Convention Paper