Forum Post: RE: Merging Traces into One Family
Hi Samir, The code in this article on support.cadence.com does what you want. Unfortunately the UI part doesn't work properly currently - you're supposed to be able to specify the number of waveforms...
View ArticleForum Post: What is the best practice for drawing RF grounded stubs?
Often when doing RF structures I need a cline where one end is connected to ground (grounded stub). The way I have been doing it is to add a static GND shape on the layer I need to connect to, and then...
View ArticleForum Post: Convergence error and inability to compute operating point
Hi, I have convergence issues even if I run very simple inverter circuit with fdsoi 28nm technology. Here I paste the schematic. As you see I tried to generate VSS=0 myself but still I have problem....
View ArticleForum Post: RE: Convergence error and inability to compute operating point
Your post got held up in moderation because it contains a lot of repeated text, which fooled the spam detector into thinking it was spam. I released it from moderation. I suggest you contact customer...
View ArticleForum Post: RE: Convergence error and inability to compute operating point
That pulse source hasn't a DC value assigned and timing/freq parameters are missing. I am not sure what Spectre is using here for the DC solution, worst case it is open and you have a floating gate.
View ArticleForum Post: tcl script
there is a command DboState in the TCLextensions document. anyone can explain it ? . what's mean about it ?
View ArticleForum Post: Sampled PNOISE/PXF analyses: how to get the "eventtime" values...
Hi! I want to automate the plotting of sampled PNOISE and PXF results, but for these simulations the getData() function expects an argument "eventtime" (corresponding to the sampling event(s) found in...
View ArticleForum Post: RE: Convergence error and inability to compute operating point
Marc, In the absence of a DC value, a pulse source would normally use the time zero value. Since there's no obvious timing values specified, time zero value would be whatever val0 was. Even in the...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Hi Jorge, sweepVarValues("eventtime" ?result 'pxf) For newer pnoise where you have the jitter(sampled) mode, you'd have to use something like: sweepVarValues("jittereventtime" ?result...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Hi Andrew, thanks for your prompt reply! I tried sweepVarValues("eventtime" ?result 'pxf) for a pxf triggered in both rising and falling events (thus 2 crossings), and the calculator gives me the...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Thanks so much for your prompt reply, Andrew! After some trial and error I got it working (got messy with the output returned by sweepVarValues()). For a 2-event (rising and falling edges) sampled PXF...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Hi Jorge, Yes, for some strange reason the calculator interprets a list of two numbers as a complex value despite there being an explicit complex type. I’m not sure why. Was about to say that you can...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Great, thanks for the info!. Just one follow up: for PXF the wave returned by getData() seems to preserve the separation by sidebands, so when I try to evaluate "the full curve" at a particular point...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
Jorge, Quick answer as plane about to take off. You should use the harmonic function to pull out the sideband you want first and then you’ll have a simple value vs frequency curve that you could use...
View ArticleForum Post: RE: Sampled PNOISE/PXF analyses: how to get the "eventtime"...
OK, thanks so much! Enjoy your flight!
View ArticleForum Post: RE: Filtering data to plot for nested sweeps
Thanks for tips! They helped a lot. I was able to create it.
View ArticleForum Post: Different pcb vendors requiring different footprints
Up until now, the company I work for has only used one pcb fab/assembly house and there hasn't been any problem meeting their design rules. But now there is a push to have a second source for our pcb...
View ArticleForum Post: RE: Different pcb vendors requiring different footprints
Hi, Yep, this does comes up from time to time. There are ways to combat this however. One, try building parts per the IPC specifications if you can. They should not have issues with IPC footprints. Now...
View ArticleForum Post: Plotting Ids vs Vgs in Cadence of a transistor - Want Y Axis to...
Hello, Simple question: I want to plot Plotting Ids vs Vgs in Cadence of a transistor but I want Y Axis to be Square Root of IDS - how do I plot this in Cadence Virtuoso/Spectre using the ADE and...
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