Is the CFB topology superior, and why? - Page 38 - diyAudio
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Old 6th November 2012, 10:29 PM   #371
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At least to up to this point the Vf versus Cf arguements have been independent of model accuracies.
Eventually, hopefully we get to were we need to refine this to determine the proper topology within the constraints.


Thanks
-Antonio
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Old 6th November 2012, 10:37 PM   #372
wahab is offline wahab  Algeria
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Quote:
Originally Posted by Waly View Post
Not sure I understand, but you think you can (using the free stock models) predict absolute THD simulation results within +/-1% precision? That would be an extraordinary claim.
Of course it s not +-1%.
I mean by a 2 ratio -50% to +100% error in THD evaluation.

Fortunately gain and phase response computation are way
more accurate for obvious reasons.

Quote:
Originally Posted by Waly View Post
The multi-million dollar models coming from our foundry are guaranteed to provide 5% accuracy against any valid configuration (though, for all practical purposes, they do better, probably around an average 2%). The whole art of designing analog circuits is to make those 5% irrelevant for the final result.

Sorry for the OT, I'm off my soapbox now.
I had no idea about foundries models accuracy , to be honnest
i thought that it was better than the numbers you re quoting
given the relative complexity of V/ULSI circuits.
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