Forum Post: PSS failing convergence on a SMPS model
I am working on a SMSP (switching mode power supply) model, by model I mean it is just made of analogLib, ahdlLib, and a custom Verilog-A elements. Transient simulation shows it is stable and waveform...
View ArticleForum Post: RE: PSS failing convergence on a SMPS model
I must also add that I see some unknown behavior from Spectre: 1) It seems to run tstab beyond the time I have set even though "Decide Automatically" is turned off. I asked it to run tstab for 15ms and...
View ArticleForum Post: RE: how to set input slew and load in template with Liberate for...
Hi, Guangjun, Thanks for your reply! According to what you say, the min/max transition vaule defined by users is really vital. It decides the lookup table for delay,power and constraint. There vaule...
View ArticleForum Post: RE: a simple way to convert AEL evaluation symbols suffixes?
Nice, thank you so much, Andrew!
View ArticleForum Post: RE: Assigning key/value pair in disembodied property list
The tricky thing here is there is no fixed constructor for dpl. That means we can flexibly compose dpl. If dpl1=‘(“a” “b” “c”) is not an eligible dpl, then there should be warning in output of...
View ArticleForum Post: RE: Assigning key/value pair in disembodied property list
It would be prohibitively expensive to continuously check the list that it consists of symbol-value pairs only. Also, because a DPL is just a list that is interpreted specially, there's nothing to stop...
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hey Andrew: Actually, I've been able to stop into the office today. The commands you provided are also throwing a similar error. -Curtis
View ArticleForum Post: RE: Assigning key/value pair in disembodied property list
Then from this perspective, it is understandable and applicable. Be little bit pedantic and off-topic, SKILL language itself always give me prosmiscuous feeling. I just guess, maybe it firstly...
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
I've found that those commands do work if I change the results path slightly by appending "/ /psf" with the test name being "FSPAR_a" in this case.
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hi Curtis, Your initial experiment was for a single point (see adeDataPoint in adeInfo), for which the cds_srr function should work. The example today has adeDataPoint set to -1 and also doesn't have...
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hey Andrew: Ok, so I ran the cds_srr commands after loading a single data point and they seemed to return what I would expect as shown below havever the aaSP function is still throwing an error as...
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Ah, I wonder if this is something to do with having more than 9 ports. The naming convention changes when you have more than 9 ports (goes from s11 to s1:1). I'll do some checks. Andrew.
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hi Curtis, Yes, that's exactly what it is. The aaSP() function assumes the signals are called "sNM" and not "sN:M". That's a bug that we need to fix. Could you log a case with support.cadence.com and...
View ArticleForum Post: RE: PSS failing convergence on a SMPS model
This is going to be pretty hard to debug without seeing it. You could have some instability in the models, or some variables that have non-periodic values. The maximum value issues can occur because...
View ArticleForum Post: Wrong data for extracted fields
I'm extracting via and pad information using extracta, and I'm getting incorrect data for the pad shape. For instance, a via in the editor clearly has pads defined as circles, but the extracta data...
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hey Andrew: I already had the following case open: Case # 46373090 Any idea how long it would take to get an update? I was really hoping to use this for some post-processing of spar results right away....
View ArticleForum Post: RE: MATLAB Interface S-parameter Data Import
Hi Curtis, I'm checking with the case owner to see if I can pick it up. This will need an enhancement to aaSP to make it smarter. I've just written a modification to the current code, and I'll send it...
View ArticleForum Post: RE: Assigning key/value pair in disembodied property list
Disembodied property lists are a long-standing simple way of representing structured data in lists, one of the primitive datatypes in SKILL. They are not intended for general purpose key-value pairs -...
View ArticleForum Post: Hierarchical design default pin placements
In Capture, I have created a hierarchical design with 8 input pins and 255 output pins. The outputs, in particular, are labelled SigOut0, PwrOut0, SigOut1, PwrOut1, SigOut2, PwrOut2, ... SigOut127,...
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