EE 421L Digital Integrated Circuit Design - Lab 4

IV characteristics of NMOS and PMOS devices in ON's C5 process

Pre-lab work

• Back-up all of your work from the lab and the course.
• Go through Tutorial 2 seen here.

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We will, in this lab and for most of the course work, use the 3 terminal MOSFET symbols seen below.
The substrate of the NMOS (body of the NMOS) is connected to gnd and the n-well body of the PMOS is connected to vdd.
Note the use of lowercase "gnd" and "vdd" names to match power and ground symbols in NCC (layout versus schematic) 



***For the cells you create in this lab, and others, use your initials or some other distinctive indication in the cells' names to show it's your work.***
Again, don't use spaces or special characters in the names.

Create schematic cells that will be used for simulating the current-voltage characterisitics of 10/2 (3u/0.6u) NMOS and 20/2 (6u/0.6u) PMOS.
Use Tools -> Simulation (Spice) -> Set Spice Model... to set the models to NMOS and PMOS.
The names of the models are seen in the model file, C5_models.txt (save this file for simulations).

Note that the "Off-Page" nodes are Exported as D, G, and S in both schematics.
Ensure that your report discusses how you draft these schematics.
Check, using F5, the schematics for errors and warnings (of course, fix these ;-).





Next generate corresponding layouts for these schematics, DRC and NCC the layouts (show the steps in your report).
Use Tools -> Simulation (Spice) -> Set Spice Model... to set the models to NMOS and PMOS (as seen on the layout).
Note that below, D, G, S, and gnd (or vdd) are exported whereas in the schematic only D, G, and S are exported.





Next generate simulation cells as seen below.
Notice that the schematic is an awkward view.
Discuss and give examples, in your report, of how to use an icon representation of the cell.
Note that the wire arcs seen below are labeled D and G, they are not exported.




Ensure that your html lab report includes your name and email address at the beginning of the report (the top of the webpage).
When finished backup your work (webpages and design directory).