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升级到Allegro17.2-2016的10大理由之5：如何层叠
在这我们谈论的不是您的叠层设计跟其他人比怎么样，而是您设计的 PCB 层叠结构，是刚性板、柔性板、刚柔板，或者使用了镶嵌技术。层叠的定义，更具体而准确的层叠的定义，是至关重要的。各种材料的安排会影响需要的阻抗控制和减少关键信号串扰的计算和分析，从而影响了最终产品性能。表达真实基材厚度（包括掩模层）的 ECAD / MCAD...
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RE: PicknPlace File generated from Orcad Layout is not in correct format
This is precisely the steps i was taking before. I was able to do everything but when i replace the footprint for the component in the layout design file, I'm trying to make it so that when it's...
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RE: How to Hide Hierarchical Ports for Isolated Power Rails
Ok, your supplied example is NOT what you stated in your opening post. However, I think you trimmed down a real example into a fake one and that has problems. All that said, I think this solvable if...
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RE: Saving node voltages in Cadence
Hi Alireza, I just tried this - it works fine for me. Which version of spectre are you using? I just tried using Spectre sub-version 17.1.0.346.isr7. It's always useful to know which version of the...
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RE: skill code to place all symbol cells in a virtuoso lib to top level...
You didn't give any indication of what went wrong or what errors were given. Three things that I can spot: The nil on the first line would probably be better being "schematic" so that it knows what...
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RE: Spectre simulation with schematic in Verilog-A
The model only defines that the voltage between ps and ns will be 10mV in your example. The absolute values will depend on how the instance of your Vcvs is connected up. If you have the ns pin...
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RE: Remove automatic parameter legend entries from sweep result plot
Which version are you using? How exactly are you generating the plots - I'm not sure I'd expect it to behave this way - so there must be some subtlety to your example which is not obvious... Andrew.
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RE: Unable to edit a cellview in a RAK
it was an issue with some permissions which I managed to fix. However I am running into a new one when following the RAK and running the AMS simulation. I am getting the error that no connection module...
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RE: Spectre simulation with schematic in Verilog-A
Thank you Andrew. Let's still take vcvs as the example. I know that if ns is connected to a reference Vref, the output will be Vref+gain*(p-n). But what if ns is floating? In my spectre simulation, if...
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RE: Spectre simulation with schematic in Verilog-A
Spectre doesn't have any "presumptions". However, floating nodes present a problem for circuit simulators, because they are trying to solve a system of simultaneous nonlinear differential equations,...
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RE: Spectre simulation with schematic in Verilog-A
Indeed a very clear explanation. Thank you Andrew.
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RE: Unable to edit a cellview in a RAK
First of all, it sounds as if the "configuration" step was not done when installing your INCISIVE (or XCELIUM) installation. You should do that to ensure all reference libraries are compiled...
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SigXp -> CM
Hi, I've imported a single line topology with impedance and PD defined into CM as an ECS. However nether of these values show up among the constraints. What is the proper way to transfer constraints...
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Differences between "report power" and "report scan_power"
Hello, I make a rtl synthesize in genus. I use both "report power" and "report scan_power" commands like below. report power -hier > power.rep report scan_power -clock 100 > scan_power.rep Also,...
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RE: Unable to edit a cellview in a RAK
I ran the configuration step again in ISCAPE to solve the first issue. But I still get the above error when trying to NETLIST . The $TMPDIR env variable is not set to anything. Should it be set to...
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RE: calibreview fatal error
Hi, I am facing the same problem, did you figure out a way to fix this?
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When using package symbol creator, standard library of footprint no longer...
Quite often I use the package symbol wizard to create new parts for my design, however recently when I go to select the psm file for the holes I can no longer find the standard examples like...
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RE: OCEAN Tutorial
I would be very interested in the 2-day OCEAN training. Can you say when it is organized in Europe?
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RE: OCEAN Tutorial
This is on-demand so the best thing to do is go to the top of this page and then Support->Training and follow the links to contact the training team. Regards, Andrew
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