A 20W per channel, analog input, class D amplifier is presented. This paper includes an overview of the design, stability equations and describes several innovations used to improve the performance of the device. Among these innovations is a novel Operational Transconductance Amplifier (OTA) input structure that greatly reduces pops and clicks at startup and a special clipping recovery circuit that reduces clipping distortion. The design tradeoffs and the silicon results are also presented.

Authors: Bean, Ronnie; Kehr, Ryan; Lind, Ryan
Affiliation: Texas Instruments
AES Conference: 27th International Conference: Efficient Audio Power Amplification (September 2005)
Paper Number: 5-1
Publication Date: September 1, 2005
Subject: Efficient Audio Power Amplification

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