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Gain of a Charge Pump in Phase locked loop
Hi,I made a charge pump for 1GHz PFD up and down signal pulses. I am interested in finding out the gain of Charge Pump. Can anyone guide me the good reference or some idea about its procedure?Thanks,
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change instance name in schematic
It is a very simple question, it seems that I can't change an instance name by "q" it in schematic window. I have to go to the property editor and change it there. For instance, I placed a resistor R1...
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gpdk045 vth at dcop is not same as model spec
Hi, AndrewI have checked the gpdk045 model report, it's said the vth is obtained using constant current method, the intercept current=Icon*W/L (Icon=1e-8A for 1.1V device and Icon=1e-7A for 1.8V...
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How to determine Scaled-sigma sampling (SSS) Number in high-yield estimation...
I am running high-yield estimation (HYE) simulation for custom SRAM design in Virtuoso 6.1.6 ADE XL. The simulation circuit is a critical path which contains representative cells and wire delay models...
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Auto PR Boundary Alignment in Custom Layout
Hi,I am doing custom layout in Virtuouso & and for that purpose, I'll define some designs (as per standard cell rules) and instantiate them in the upper level layouts.Now, when I instantiate any...
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Modifying a technology library in IC 6
Our company is doing MEMS design. Several years ago, when we started, we decided to use IC 5.1.41 and I have modified the technology ( TSMC 180nm) to include the needed layers. Now, we want to start...
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ADEXL: use DirectPlot->Main Form with saved data
Hello!I run my simulations in a /tmp/ folder in our server, that is weekly cleaned, and I copy the meaningful results in my local folder. So, the Result Directory Location in ADEXL is set to the tmp...
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What is this section category in Model Library Setup in Cadence Virtuoso ADE L?
I usually leave it at default while constructing circuit in Cadence Virtuoso. I didn't really understand what it is or why it is used for.In Global Model files section I have NN, SS, SF, FS, FF , etc....
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Mark Net Stop Layer Not Working as expected
Hi All,Here is my tool info: Virtuoso ICADV12.3-64b: Here is the Screenshot of the MarkNet Options forum: We use MxCUT mask1 as a STOP layer for Mx mask1 metal. (x=0-3). Similar to MxCUT mask2 and Mx...
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2 Pads having the same Pin number
HelloI designed a foot print for a connector" The suggested footprint looks like the one below. This connecteur only have 2 positions, so this means 2 pads are electrically connected. on my layout on...
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Controlling combinations in Techgen / Techgen for Quantus-FS only?
I'm trying to understand what options, if any, I might have for controlling what different combinations of layers, widths, and spacing are used in a "Techgen -simulation" run. This is EXT17.12. Also...
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When does opening an ADE-XL view cause also ViVa to open?
Hello all,this is just a curiosity, but it has been tormenting for a while.Sometimes, when a colleague of mine opens an ADE-XL view, ViVa also opens, showing the last waves that were plotted.Sometimes,...
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Monte Carlo: Define instance mismatch correlation in IC61.6/7
Hello,I have spent a lot of time investigating following task:Assume I have to perform mismatch simulations of a comparator using montecarlo anlaysis in ADE-XL. I need to collect comparator offset (dc...
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PSS sweep can't
Hi, I am simulating an oscillator with 8-bit trimming ability. An variable "TRIM_CODE" is defined as a decimal value then I use equations to define binary code from D7 to D0, which can be calculated...
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Sequential execution of skill command in CIW window
HI ,Is there anyway to execute skill command on a sequential manner?Like while one command is getting executed, virtuoso will wait. Once execution is completed it will move on to command.can...
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Montecarlo: generate immediately all netlists
Hello,today I am facing an odd problem. Depending on the max job number and the number of points, some netlists are generated after a while, when the associated job is ready to run.Problem is that,...
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dcOperating point showing a delta error compared to expected results
Hi, I am running a dc simulation using Spectre, the simulation is very simple, I am just using and Ideal dc supply from the analogLib to pump a certain DC current in the drain of a transistor and I...
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Distributed Processing Library command line
I've been looking in to how I can get multiple machines involved in a Techgen run. I read the DPL User Guide and it suggests some command line utilities for verifying the DPL config file...
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Generation of ITF file from ICT file?
Hi ,Is there any way to generate itf file from ict file ? I could see there are some cadence utilities for conversion of itf to ict but i couldnt find the other way around.ThanksAnand
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saving results with same net names of two different cells
hiI ran two simulations separately to compare the output of two circuits (Both circuits are in same library with different cells but nodes names are similar). I cannot compare the two results as only...
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