sigma delta adc in cadence spectre

[Firas]

snr calculation in cadence

Hello friends,

I'm working on a second order switched capacitors sigma-delta modulator,
I want to calculate the SNR of the modulated signal (output of the modulator),

Please can anyone help me how to calculate the SNR of this signal with the calculator of CADENCE,

Thanks in advance.

 

[ljy4468]

snr cadence

I do not know how to calculate SNR with cadence.

But in my case, I simulated & extracted data (0,1,0,1,1......) and calculated SNR with MATLAB.

If you want, I can send you my code.

 

[PoojanWagh]

cadence snr

Here's how I do it:
https://www.circuitdesign.info/2008/09/calculation-of-adc-snr-in-cadence-skillocean/

P.S. I also dump to Matlab for an FFT. However, I do compute the SNR/SNDR using Cadence Ocean/Skill.

 

[Firas]

snr cadence calcualte

I do not know how to calculate SNR with cadence.

But in my case, I simulated & extracted data (0,1,0,1,1......) and calculated SNR with MATLAB.

If you want, I can send you my code.

Hello ljy4468

I have find many code that calculate the SNR with MATLAB, but everyone give me a different result compared to others, and I don't know what is the best one.

Please can you send me your code.

Thanks.

Added after 2 hours 11 minutes:

Here's how I do it:
[url]https://www.circuitdesign.info/2008/09/calculation-of-adc-snr-in-cadence-skillocean/[/url]

P.S. I also dump to Matlab for an FFT. However, I do compute the SNR/SNDR using Cadence Ocean/Skill.

Hello PoojanWagh

I don't find the code of "matpsd" procedure in this skill/ocean code,
please can you send me the code of this procedure,

Thanks.

 

[ljy4468]

snr in cadence

Ok here it is.

Matlab code & example extracted file.

Hope it can help you.

Regards

 

[Firas]

calculate snr in matlab

Hello ljy4468

Thank you for your help.

When I run this code, an error come out at the line 15 because the function calculateSNR.m is not found.

??? Undefined command/function 'calculateSNR'.

Error in ==> sdmcal at 15
snr_=calculateSNR(spec(1:ceil(N/(2*OSR))),tone_bin);

Please can you send me the code of this function.

And please can you explain to me what is the variable tone_bin.

Thanks.

 

[ljy4468]

snr in cadence

Oh I should send calculateSNR.m, I had forgotten.

Sorry, I'll send you later at my home, because I'm working now in my office.

Regards.

Added after 10 minutes:

You can also find file on below website.

https://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=19&objectType=file

 

[naisare]

Thanks for these Matlab files. I was looking for these files to calculate SNR of my Sigma delta ADC.

When I simulate this file I have an error,
"??? Undefined function or method 'calcSNR' for input arguments of type 'double'."

Function calcSNR is not defined..Can you please help me.

Thank you