27th International AES Conference
 

PAPER SESSION 5: IC AND INTEGRATION



5-1 An Integrated 40-W Analog Input Class D Amplifier with Improved Clipping Recovery and Reduced Turn-on Transients


Ronnie Bean, Ryan Lind. Texas Instruments, Ridgeland, MS, USA.


A 20-W 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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