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How to measure the SNR for the sigma-delta modulators?

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samvelc

samvelc

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Hi all,

I have a question.

How to measure the SNR for the sigma-delta modulators. :?::?::?:

Thanks in advance.
 

SNR measure

apply input tone signal then do FFT with output bitstream.

The ratio of signal power to noise power would be SNR.
 

Re: SNR measure

qslazio said:
apply input tone signal then do FFT with output bitstream.

The ratio of signal power to noise power would be SNR.
Click to expand...

Thank you.
Can you please advice how measure SNR for the following scheme: (1st order digital sigma-delta modulator)

Please, see attached file.


I apply sin input (44.1KHz) signal.
What do you mean by saying"signal power" and "noise power" ???? in what frequency range????

Please, advice
:cry
 

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