Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

SNR calculation of Delta Sigma ADC after Modulator and After Decimation

Status
Not open for further replies.
E

Eminent.Engineer

Member level 3
Joined
Oct 8, 2012
Messages
54
Helped
10
Reputation
20
Reaction score
10
Trophy points
1,288
Activity points
1,630
Hello Everyone

I have designed a decimation filter for Delta Sigma ADC and now I want to calculate the SNR of Delta Sigma ADC after the modulator and then after Decimation. As far as Schrier and Malcovati's Toolboxes are concerned I was unable to apply them (How to use them because lot of parameters to be mentioned ? :|) to decimated data so any helpful tutorial/suggestion related to problem will be highly appreciated.

Thanks to all.
 

hello Eminent.Engineer,

I hve also designed a delta sigma ADC and i calculate the SNR .In order to caculate the SNR after the modulator you must make the fast fourier transform function (FFT) by MATLAB after the modulator.

About the decimation,until now i have designed the complete ADC in Smulink (MATLAB) then by using CADENCE, i only designed the modulator with layout.
My problem is how to design this filter with layout.



regards
fasto
 

fasto2008 said:
I hve also designed a delta sigma ADC and i calculate the SNR .In order to caculate the SNR after the modulator you must make the fast fourier transform function (FFT) by MATLAB after the modulator.
Click to expand...

Thanks for your timely reply. Can you share the MATLAB code (it will be really helpful) ?
 

in this case we suppose that y is the output of modulator:

a=fft(y);
b=abs(a.*conj(a));
plot(10*log10(b/max(b)));
xlabel('Frequency (Khz)');
ylabel('Output spectrum (dB)');
grid;

About your decimation filter for Delta Sigma ADC, can you share me as an exemple the MATLAB code.

Thanks for help
 


Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top