Help me, How to evaluate the performance of the Sigma-delta ADC in Simulink.

lines said:

Hi all.
I've designed a Sigma-delta ADC, which conculde a modulator and a decimation filter.
The output of the modulator is ±1, as the quantilator is 1 bit. and the SNR is 106dB.
But, How I evaluate the performance of the output of the decimation filter,as to say, the performance of the ADC.
I want to use SNR to weigh the perfomance of the filter's output.
Can anyone help me ? Or give me other methods to weigh the performance of the ADC in Simulink or Matlab？

Thanks .
A student form changsha,china.
Thanks.:smile:

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gautamvsharma said:

Hi Friend,

I worked on 24-bit Sigma delta ADC architecture of TI based ADC. as per your problem, you must have 2^(resolution of bit) bins and then try to plot histogram in matlab and try to write macro in MATLAB for OE and GE measurement. then you can conclude your decimation filter is doing finer filtering or not!!

if you wish then you can mail me for further queries,

Gautam
gautamv.sharma@gmail.com

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