CMOS Model card for demonstrating simulations in an analog blog

Hi,



I am planning to start a blog on analog circuits and am looking for a model card to demonstrate simulation examples. Can anyone point me to any freely available model card which I can use and even re-distribute on my blog site? It need not be a high end node; just something good enough to run simulations for basic analog circuits.

Looking forward to your comments.



Thanks and Regards,

Hobbyiclearner

Maybe look at J.Baker's website cmosedu.com He might have something there.

If you are not interested in back end , go for the predictive technology models from ASU. http://ptm.asu.edu/

The FreePDK from NCSU has back end support as well and has model files compatible with HSpice and Spectre. See this link: http://www.eda.ncsu.edu/wiki/FreePDK

vivekroy said:

If you are not interested in back end , go for the predictive technology models from ASU. http://ptm.asu.edu/

The FreePDK from NCSU has back end support as well and has model files compatible with HSpice and Spectre. See this link: http://www.eda.ncsu.edu/wiki/FreePDK

Click to expand...

Thanks. This is what I was looking for. I just needed one more advice. Do you know any tool where I can sketch the schematics. I need a tool where I can easily draw the MOS transistor based schematic, label the node voltage and branch currents, write explanation about the circuit behavior etc. (I am planning to use LTSPICE for front end simulation but the schematics are not good enough for using them in the text)

Looking forward to your response.

Regards,
Hobbyiclearner

Schematics from LTSpice could be "good enough"
if you post-process them and maybe turn off the
grid, etc. I do most of my documentation with
alt-PrScrn and a graphics editor, from a 4K display
you will get more than adequate quality.

XCircuit is meant for publication quality schematics
although the style doesn't appeal to me as much
as some others, you might need to make your own
symbols if you have a similar opinion.

I use Xschem now, I like it a lot and it's got some
decent hooks for simulation, recently added the
schematic drive node plotting capability in
concert with ngspice and gaw (viewer). Does not
yet have port-current plotting though (you'd just
have to give that command directly to ngspice).

Have you tried drilling into MOSIS for SPICE models?
I recall finding some there, and also at the LASI7
home site (currently maintained by Jake Baker
although it seems less active than it once was).

This website gives pretty readable schematics from LTSpice .asc files.
I think I remember it having 'quirks' about labels sometimes but not bad overall.

(Example conversion below)

https://reaylabs.com/tools/SchematicViewer/SchematicViewer.html