AES E-Library

Progress Towards a Digital Power Amplifier

This paper reports advances made in the development of an all digital audio power amplifier or power digital-to-analogue converter. A previous paper (1) reported simulation and theoretical results and demonstrated that they were in agreement. A hardware test rig has been constructed for both one and two-sided digital (uniformly sampled) pulse width modulators and it is shown that the one sided modulator confirms the theory previously reported, but that the two sided modulator does not, though its performance in some cases exceeds that predicted. Since the original paper other work in the area has been reported (2) which claims that uniform and naturally sampled pulse width modulation are essentially the same and therefore that criteria developed for naturally sampled systems may be used to design uniformly sampled systems. To refute this assertion a two sided naturally sampled modulator has been constructed and the results so obtained are compared with those of the uniformly sampled system.

Author: Sandler, Mark
Affiliation: King's College London (KQC)
AES Convention:80 (March 1986) Paper Number:2361 Import into BibTeX
Subject:Digital Audio Techniques

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 aes11)   /pp8690/pp8603/2457.pdf

Start a discussion about this paper!