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Topic: Wikipedia page on Analog to Digital Converters (Read 3404 times) previous topic - next topic
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Wikipedia page on Analog to Digital Converters

Reply #1 –
That's not aperture error. Aperture error is the high frequency roll-off caused by having a sampling instant that's longer than infinitely short. Within limits, it's entirely predictable (a sync function in the frequency domain) and correctable (just boost the high frequency by the appropriate amount - the limit being quantisation noise/resolution).


For the calculation, they should show how it's derived - which is supposed to be from the slope of the waveform at its steepest point (zero crossing), equated to one quantisation step.


I'm not convinced by that last bit about 44.1kHz.

Cheers,
David.

Wikipedia page on Analog to Digital Converters

Reply #3 –
yes, Finite (rectangular rather than instantaneous pulse) sampling in the time domain gives a sinc function in the frequency domain. Currently on too slow a connection to download a 4MB file right now.

Still nothing to do with jitter.

Wikipedia page on Analog to Digital Converters

Reply #4 –
I fixed many of the more ridiculous problems with the article.  Would still appreciate it if someone could look over it though.

Wikipedia page on Analog to Digital Converters

Reply #5 –
Quote from: saratoga on
I fixed many of the more ridiculous problems with the article.  Would still appreciate it if someone could look over it though.


That's a really nice thing to do. Glanced through it, seems ok, but I'm far from an expert (really, really far).
 

Wikipedia page on Analog to Digital Converters

Reply #6 –
In the first sentence of the "jitter" section, why does it refer to digitising a sine wave? Jitter affects all input.
In the last sentence, there's a typo: "...  (in this case, < 22kHz kHz) ..."

Yeah, I know, if I don't like it, fix it myself.


Regards,
   Don Hills
"People hear what they see." - Doris Day