I am currently working on SRAM cell. I need to calculate the SNM-read, write and idle for my cell. I have the understanding of what is SNM. But i am not sure on how to plot the butterfly curve for the cell in cadance. Could any1 please help me with this.
Not sure why you've filed this under RF design, because it's not really RF related. Anyway, there's an example of using SpectreMDL to do SNM measurements. See:
There's a pdf in there, and a gzipped tar file containing an example database. In the version I looked a, page 63 of the PDF talks about doing SNM