simualting for sigma delta noise folding due to charge pump nonlinearity
Hi,In the context of fractional plls, the nonlinearity in the PFD+CP transfer characteristic would result in noise folding which would increase the low freq phase noise.I want to create a simple...
View ArticleMonte Carlo Problem with Swept PSS and PAC
I am following the example in SpectreRF manual to simulate IP3 using swept PSS and PAC combination. I added output-referred IP3 as an output, using the Direct Plot form. When I run a nominal...
View ArticleModify netlist of a block and resimulate (CDL.... CDF....)
Hello everyone,I am trying to pinpoint a layout error mechanism by modifying the av_extracred view netlist and resimulating the testbench. I have managed to create a manually written netlist as a...
View ArticleAlgorithm used for implementation of Division
HiWhat is the default algorithm used for hardware implementation of division operation when synthesised using RC Compiler. Like the code below beginquot[n:0] = divd/dvsr;remi = divd%dvsr;end
View ArticleHierarchy Editor - Setting schematic view recursively within a tree
I'll try and explain my problem clearly first (sometimes there is an alternative solution). I have a chip with distinct sections. Schematically they reside in different instances (eg I0 and I1).I want...
View Articleocean XL
Hai, I am very much new to oceanXL script. By using "save M1.m1:oppoint", i can't plot small signal parameters of MOS in ocean script. The expression willl appear as...
View ArticleIs it possible to have different run modes for different tests in the same...
Let's say we have two tests in an ade xl view. I want to choose Single Run, Sweeps and Corners for the first test and for the second test I want to run Monte Carlo Sampling. I tried but I couldn't have...
View ArticlePin/terminal locations on symbol
Am I following the correct path? geGetSelSet()~>instTerms~>term~>?? What is the path the find the pin/terminal location of a symbol in a schematic?
View ArticleClik here to view.
[Need Help]Cadence16.6 Entry point not found, could not be located in the...
Install cadence 16.6 ok, but fails to open the exe.Capture fails is just as the picture. Allegro also fails, says could not be located in the dynamic link library cdscommon.dll. See the pic. I used to...
View Articleskill writing style
I am new to skill and was looking at skill codes available on the web. I found abMapAndWire.ils by Andrew Beckett and noticed that variables are assigned in the first form below rather than the second....
View ArticleHow to disable vr_axi checks
Hi I am new to vr_axi enviorment,in my testbench i have some axi interfaces. I want to understand how to disable vr_axi checks like below"ERR_VR_AXI190***"
View ArticleForce a callback when a form is canceled?
I've got a close button on my form, but is there a way to force a similar callback to be invokedwhen the upper right "X" button is clicked? I'd like to make sure that I do some highlight cleanupswhen...
View Articlebbox values in menu
Is there a way to store several bbox values in a menu without converting it to a string?Example of value bboxList = '(((131.8625 -760.5125) (131.8875 -760.4875)) ((131.8625 -749.5125) (131.8875...
View Article[Help] PADS layout to Allegro PCB translation
Hi all,First, thanks for the time of you on this post.I have a 8-layer PADS PCB layout designed by other people, which you can see from the attached Figure 1. What I want to do now is to extract the...
View ArticleWarnings during the use of Spectre
Hi~ I am kinda a newbie to Cadence. Don't laugh at me if my questions are stupid :)I am using version 5.1.0, and IBM design kits.Some warnings come up when I start up cadence. 1. Startup:*WARNING* No...
View ArticleSkill Script for off-grid correction of donut shape?
Hi, I have been looking for a Skill script which corrects off-grid edges of a donut shape in Cadence(IC6) Layout editor. I have found this script but it says it is not for donut....
View ArticleAdding Layout block from Encounter to custom design
I managed to get Encounter auto-route and place the design, imported it into the Virtuoso environment as a Layout view, then runned DRC, then runned LVS versus the CDL file of standard cells and...
View ArticleTrigger Warning at Virtuoso start up
*WARNING* (DEBASE-102068): No user triggers registered for viewType schematicSymbol.*WARNING* (DEBASE-102068): No user triggers registered for viewType maskLayout.*WARNING* (DEBASE-102068): No user...
View ArticleWarning (TECH-230035): warning when create library
Hi everyone, I would like to ask about a warning in CIW. My systems: Cadence IC615, IBM cmrf7sf V2000 pdk. When I try to create a library which "Attach to an existting techfile" option, the CIW...
View ArticleSimulation Profile Setup Issues
Hey I'm pretty new to PSPICE and I've followed every tutorial there is and they all pretty much say you can choose the "none" option to avoid the inherit from issue when there are no .sim files to...
View Article