class D design issue

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Hello,
I am very new at the concept of class D amps

I have been trying to design a class D audioamp prototype on a breadboard with a single 5 V supply. All i need is about 1 to 2 watts of power into an 8 ohm speaker.

I'm unsure of how to build the feedback network which corrects for the distortion . Right the now the sound is really bad.

Does any one have any suggestions on how to build the feedback network and what the capacitance values need to be?. Also if someone has a schematic for a working class D using discrete components it would be really helpful.

Thanks in advance!
 
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