The distortion performance of switching amplifiers (a.k.a. "Class-D" amplifiers) has rapidly improved in recent years. Unfortunately they still exhibit a form of high-frequency non-linearity that is not clearly revealed by traditional THD+N and SMPTE-IMD tests. The Twin-Tone IMD measurement technique provides an excellent way to measure this form of distortion.

Author: Hofer, Bruce
Affiliation: Audio Precision Inc.
AES Conference: 27th International Conference: Efficient Audio Power Amplification (September 2005)
Paper Number: 6-1
Publication Date: September 1, 2005
Subject: Efficient Audio Power Amplification

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