AES E-Library

A Low-Distortion Fast-Settling Audio Oscillator: A Tribute to the late Peter J. Baxandall, Audio Analog Expert

This paper is dedicated to the memory of Peter Baxandall, well-known for his work in audio and electronics. It is an exposition and analysis of a low-distortion fast-settling audio oscillator that he designed and built. Normal oscillators are shown to suffer from amplitude instability when the thermally-variable controlling resistance has a long time constant. The genius of the present two-integrator design is that it derives its amplitude stability from the cancellation of two square wave signals, of which one is fixed in amplitude, the other proportional to the oscillator output, with a threshold. A detailed analysis of the oscillator is presented. The result is an oscillator with distortion below 0.01% and settling times of approximately 1 oscillation period. It is particularly useful in automated test equipment.

Author: Vanderkooy, John
Affiliation: University of Waterloo
AES Convention:122 (May 2007) Paper Number:7150 Import into BibTeX
Subject:Instrumentation and Measurement

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 122Papers)   /122/7150.pdf

Start a discussion about this paper!