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Sci.Electronics.Repair FAQ: Various Schematics and Diagrams
This is just something I found on google. Hope it helps. This was the first result. If you google it, you'll find so much more.
I don't have multisim, so I can't check your circuit. But from what I can see, your transistors have no DC bias. Check if you have given Ac signal (Which I can see you have) at the input, but it should also have a DC offset. This DC offset is required to make the transistors go into saturation...
Check if you have given vdd and ground pins or at least labels. Also finish LVS first before you begin pex, since pex requires lvs to be done first. In any case, it runs lvs first before doing extraction.
Also, there's an option called LVS options. There, you can also give user specified names...
Check your netlist file. Most of the times, there are only .subckt definitions there. You will have to instantiate the top-level of your design in the netlist. That's all I can think of...
I don't understand your question. How can you compare the two? Thin film physics is a specific stream of physics and engineering. Nanotechnology is a broad categorization of any technology/science that is dealing with nanometer-level physics.
Check the layer select window. If you see a p-well as well as an n-well layer, than your pdk supports connecting bulk to source. Also, if its the TSMC 0.25 pdk, you can always go to their website and check there.
Follow the DRC Rules! Look at the documentation for your technology.
Other tips:
Do DRC various times while making the layout. That way you won't be overwhelmed in the end.
Always instantiate smaller blocks like basic gates. If you first build a library with basic cells like NANDS, NORS...
Modelsim has a particular syntax that lets you run scripts. I'm not sure about this, you can check this in the manual.
Try: vsim <top_level> -do sim.do
This loads the top level, and modelsim reads the sim.do file. This file should obviously only have modelsim instructions and no shell...
Actually, it's not just about scaling the widths. Different technologies may affect the design in various ways. 90nm and below technologies show greater short channel effects. You should redesign the RAM cell, and check the noise margins. You will definitely have to change the sizes in a...
You can actually write a perl script that does all this, and call hspice or spectre or whatever you are using for the simulation through the script. You could even write UNIX shell code (more complicated).
Actually, there is one more reason. Higher level metals are used to route across long distances. And the longer you want a metal line to be, the thicker it has to be. This is because of process limitations. (Otherwise even a small variation on the line can cause shorts/open ckts)
Also, vias...
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