Hi , i need your help plzzzz.
I have simulated 2 bit Flash ADC (for better understanding), it works well. Simulation of Fast Fourier transform and waveforms are attached below.
I want to find SNR, SNDR, ENOB FoM from these plots using MATLAB. I have imported the LTspice data into MATLAB but dont know how to find Signal Power, Noise Power etc.
Your suggestions / solutions in this regards will be highly appriatable.
Thank you
Dear Mubashir Masood
You can use “sinad“, “thd”, and “snr” Functions in matlab. As you know, sinad can be easily transformed into Enob so in that case computing sinad is enough.
Best regards
Nima
See examples below:
https://www.mathworks.com/help/signal/ref/snr.html
I recommend using Micro-Cap (http://www.spectrum-soft.com/download/download.shtm). All EE's at Emerson used Micro-cap, even though it cost $4,000 each. There are no other electronic SPICE modeling programs even close to Micro-Cap capability.
Micro-Cap is now free. Andy Thompson, owner of Spectrum Software, has retired.
Micro-Cap does worst case analysis --- changing the tolerances of components --- changing the temperature --- etc. And it is easy to use.
I have used Micro-Cap for all of my electronic designs since 2001. When I tested prototypes, they worked exactly as the model predicted.
The website --- https://NDAcademy.FoxPing.com/ --- 2.8 Electronic Cascade RC Filters --- and --- 7.2 Electronic SPICE Models --- provide examples.
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