Lab 4 - ECE 421L 

Authored by Brandon Staffieri

staffier@unlv.nevada.edu

September 15, 2021

  

Lab Description

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

   

Prelab Content

Prior to this lab session, we were tasked with backing up our previous work (as usual) as well as finishing Tutorial 2, in which we learned how to create the schematic and layout for an NMOS/PMOS transistor. We were also asked to perform a preliminary reading of the lab and were provided with some necessary information regarding the bodies of NMOS and PMOS devices in our upcoming simulations.



   

Postlab Report

The first task was to generate 4 schematics and simulations as follows:

   

A schematic for simulating ID v. VDS of an NMOS device for VGS varying from 0 to 5 V in 1 V steps while VDS varies from 0 to 5 V in 1 mV steps. Use a 6u/600n width-to-length ratio.

   
A schematic for simulating ID v. VGS of an NMOS device for VDS = 100 mV where VGS varies from 0 to 2 V in 1 mV steps. Again use a 6u/600n width-to-length ratio.


   
A schematic for simulating ID v. VSD (note VSD not VDS) of a PMOS device for VSG (not VGS) varying from 0 to 5 V in 1 V steps while VSD varies from 0 to 5 V in 1 mV steps. Use a 12u/600n width-to-length ratio.


   

A schematic for simulating ID v. VSG of a PMOS device for VSD = 100 mV where VSG varies from 0 to 2 V in 1 mV steps. Again, use a 12u/600n width-to-length ratio.

   

I then downloaded the provided example cells (lab4.zip) for reference. The next task was to:

Lay out a 6u/0.6u NMOS device and connect all 4 MOSFET terminals to probe pads (which can be considerably smaller than bond pads [see MOSIS design rules] and directly adjacent to the MOSFET (so the layout is relative small). 


   
I then verified that the layout was DRC and LVS clean.

   

Lastly, I similarly connected all 4 MOSFET termals of the PMOS device to probe pads as per the following instructions:

   
Lay out a 12u/0.6u PMOS device and connect all 4 MOSFET terminals to probe pads.


   

Backup

My online backup of my completed files can be downloaded here.

       

Return