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Using PWM output for class D amplifier in SigmaStudio for SHARC

Question asked by hypierre on Jan 14, 2014
Latest reply on Feb 20, 2014 by hypierre

I am new to Analog Devices DSP. I am working on a project using SHARC ADSP-21479 but I have some questions about the PWM output. Hope I can get some advice here. Thanks!

 

On the Sharc ADSP-21479, there are some PWM outputs. I am planning to use these PWM outputs to drive a class D amplifier chip. However, in SigmaStudio, there is no option of PWM in the output block. My first through is to use the algorithm designer to create a customs block to convert the audio to PWM output. Is there anyone managed to do so? Is it a correct direction?


I found a discussion for Blackfin (not Sharc) http://ez.analog.com/message/33505#33505 on generating PWM singal for audio application. There is also a note about this http://www.analog.com/static/imported-files/application_notes/EE242Rev2Jan1106.pdf. Will this be similar for SHARC? Is there any limitations when using the PWM outputs for audio application?

 

Thanks!

Pierre

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