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An Integrated 40W Analog Input Class D Amplifier with Improved Clipping Recovery and Reduced Turn-on Transients

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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.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=13269

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