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ams simulation does not work
Hello, After setting up my maestro (let's call it maestro1) and changing the simulation with ams, a warning window popped up.Unfortunately, I did not save this warning window.My hazy memory tells me...
View ArticleADE Reliability analysis: Also for XF and DCMatch?
Hi,To get all PSRR's I am using all the times XF instead of AC analysis, but now I see in rel analysis xf (and few others) are not supported.Is there a workaround to run also XF?Virtuoso 20.1 is...
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Two-Stage Op Amp Ideal Vref Help
I would like to have an Ideal Vref of 2.5VHowever I would like to know if the values for the test bench that I made is right For the maestro, my expressions are:The figure below is my Two Stage Op...
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error regarding connectLib and its location
Hello, I receive this error when simulating with ams.The blocked area is my working directory.The strange thing is there are 2 slash in that path.Where is the location this path supposed to be...
View ArticleVirtuoso virtual connections?
I am finishing up layout out a chip (thank God, I am done with layout!) and have four vss pads, all connected to the vss! global net on chip. In the ECAD days, I would've suffixed them with a ":"...
View Articleif save/recovery available in ams
Hi,I know in spectre based tran simulation option/state file tab, there are some save/recovery options. However, I dont find them in ams based tran simulation option. Does it mean the save/recovery...
View ArticleVcres parameters
Hello i am using a vcres cell in analoglib. My question is how to set its parameters? especially the vol/res conversion factorThank you
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transient noise simulation
hi guys,i'm running transient noise simulation, while trying to use this "noise contribution" option, to cancel the noise in few inverter stages:in pre-layout simulation it works perfectly. however,...
View ArticleImporting layers from GDS inside Virtuoso which are not in the PDK layermap file
Hi All, I am importing a GDS inside Virtuoso when I am seeing the below warnings in the stream log file indicating that some of the custom layers didn't get imported. WARNING (XSTRM-36): The objects in...
View ArticleSweeping one parameter in only one test for ADE XL
Hello all,I am looking to run two tests in ADE XL. One test has both transient and DC analyses, and the other is running an AC analysis to measure the input capacitance of a transistor. These analyses...
View ArticleR5"">bindKeys file "< Key > R5"
I see "< Key > R5" in the shortcut in bindkey file, which key on the keyboard and how to set this shortcut.
View ArticleHow to set fluid guard ring contact size as rectangle
Dear，I looking for to use fluid guard ring from technology file. But seems the generate contact size must be square instand of rectangle. Is there any way to use rectangle contact in fluid guard ring?
View ArticleLimiting the length of a vector in VIVA
HiIs there a way to get an arbitrary length of samples using the "value" command? I have it set up to gather from the starting point and using the ?period argument I have it resampling but I only need...
View ArticleADE: Need a trick for plotting result values vs corners
Hi,I want to plot Phase margin vs load cap CL, so I define CL as sweep in the corner setup.I run at Nominal, and at worst-case corner (like AllMin and 125C).However, when starting from Detail Results...
View ArticleHow to copy designs to different machines?
I am trying to copy the OTA I designed from my local workstation to a remote server. I just opened a new project on the server and manually copied the sizing of each transistor. The strange thing is...
View ArticleB1f and K in sp Analysis
I was checking stability of a differential single stage amplifier, obviously I had 50-ohm port in 50-ohm port out, I checked K which at some frequencies was below one, which means potentially unstable,...
View ArticleWhere is SMG "schematic model generator“ in IC618
SMG was very useful for system level verification in IC617, while I didn't find SMG in IC618, is name changed or removed? Thank you!
View Articleenvironment variable to enable LSCS
Hi, I would like to ensure the default job mode is LSCS, but NOT ICRP. How can define this by environment variable?My cds version is ICADVM20.1-64b.500.30My spectre version is 21.1.0.664.isr16.Thanks...
View Articleuse $cds_set_temperature in verilogams report “...libvpi.so...” error
I try to use $cds_set_temperature() function from this post: Verilog-A control of temperature, report error:Unrecognized system task or function....libvpi.so: cannot open shared object file: No such...
View ArticleWaiting for available license for Virtuoso(R) Spectre
Hello,I am going to use "msource" in "rflib" to peform EVM and ACPR simulation.However, when I run the simulation, the simulation only show the below statement:"waiting for available license for...
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