How do you use spectre (and Cadence) to do a .stb analysis on your fully differential loop?
In unix, spectre -h stb
is a start - gives you something to read - which is not super helpful if you want to get stuff done, but, something's better than nothing.
The magic stuff is - use the cmdmprobe cell from analogLib and set the CMDM parameter to -1 if you want to measure the differential loop gain. Leave it at 1 for the common-mode loop gain.
Couldn't be simpler. Job well done folks.
And here's one time-saving tip when working on M$ Windows and needing to make screen captures - do a Windows-S key combo - now you get the option of doing a selective snapshot of a portion of your screen - eliminates on step - you don't have to do PrintScreen->Paint->Select. Now you can go straight from X-Windows to Windows app.
