It's not a chip, but Tekko has it here:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=109844
Remove the "power output" stage, and you've got a basic sigma delta.
Remove the flip-flop and it is a self-oscillating Class D.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=109844
Remove the "power output" stage, and you've got a basic sigma delta.
Remove the flip-flop and it is a self-oscillating Class D.
Designing a sigma-delta loop is not that difficult in theory but practical implementation can be a PITA.
There was once a two-chip delta sigma ADC by Burr-Brown that consisted of the delta-sigma modulator/converter and the decimation filter in two seperate ICs. But the delta-sigma converter was 4 bit - I guess that you are looking for a one-bit solution, don't you ?
Regards
Charles
There was once a two-chip delta sigma ADC by Burr-Brown that consisted of the delta-sigma modulator/converter and the decimation filter in two seperate ICs. But the delta-sigma converter was 4 bit - I guess that you are looking for a one-bit solution, don't you ?
Regards
Charles
Since you are a student of engineering you probably have access to the JAES, have you ?
There was an interesting article in Vol 52 March 2004 of the JAES called: "One-Bit audio: An Overview"
This is a good article to give you some basic understanding of DS modulators.
Regards
Charles
There was an interesting article in Vol 52 March 2004 of the JAES called: "One-Bit audio: An Overview"
This is a good article to give you some basic understanding of DS modulators.
Regards
Charles
And here is a nice paper by Bruno Putzeys showing some interesting design -details/-decisions of a practical implementation of a high quality audio ADC :
http://www.grimmaudio.com/whitepapers/discrete ad converter.pdf
Regards
Charles
http://www.grimmaudio.com/whitepapers/discrete ad converter.pdf
Regards
Charles
I just re-read my post and realized that it sounded sort of.... abrupt.
I read through that thread and it was amazingly helpful, I haven't noticed it before.
And I am looking for a single bit stream. I've started plugging away in OrCAD to try and design one up.
If anyone has any hints about designing the integrator or choosing components I'd love to hear about them, or even if I could be pointed towards another good thread or site that'd be great!
Thanks everyone for your help.
I read through that thread and it was amazingly helpful, I haven't noticed it before.
And I am looking for a single bit stream. I've started plugging away in OrCAD to try and design one up.
If anyone has any hints about designing the integrator or choosing components I'd love to hear about them, or even if I could be pointed towards another good thread or site that'd be great!
Thanks everyone for your help.
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