AES Store

Journal Forum

Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
10 comments

Reflecting on Reflections - June 2014
1 comment

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Access Journal Forum

AES E-Library

Slewing Induced Distortion and Its Effect On Audio Amplifier Performance—With Correlated Measurement/Listening Results

There has been a great deal of material in the literature in recent years on transient intermodulation distortion (TIM) as a major distortion mechanism in audio amplifiers, particularly IC op amps. A detailed study of high level high frequency performance of op amps involving over 100 different device samples reveals the true distortion mechanism to be slew induced distortion (SID), with TIM actually being only one particular manifestation of SID. The study demonstrates a direct correlation between device slewing rate and THD, two tone IM, and TIM test results, as well as listening tests. The results allow not only predictable electrical and audible results of feedback amplifiers based on slew rate behaviour, but also dispel several popular myths involving open loop bandwidth and feedback factors as design criteria. Some major implications of this study are a new slew rate criteria for high quality audio circuit performance, the nature of various op amp slewing behaviour patterns, the audible nature of SID as correlated to actual slew rate, and the necessity for industry recognition of slew rate in both equipment specs and testing methods.

Authors:
Affiliations:
AES Convention: Paper Number:
Publication Date:

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:

Start a discussion about this paper!


 
Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society