Lab 1 - EE 421L
Email: alvara6@unlv.nevada.edu
August 26, 2020
·
Laboratory introduction, generating/posting
html lab reports, installing and using Cadence
Pre – Lab
- The
lab reports will be drafted using html and placed on CMOSedu.
- Prior
to the first day of lab, but no earlier than one week before the lab
starts, get a CMOSedu account, using your UNLV
email address, from Dr. Baker.
- Review
the material seen here covering
editing webpages (do this before the first lab).
Shown below is my lab index that I
created once obtaining a CMOSedu account from Dr.
Baker.
Lab Tasks
Go through Cadence Tutorial 1 up to the image 25.
1) simply show some of the images in this tutorial (that you
generated) with some simple coherent narrative
2) discuss how you will do regular backups while working on
the future labs by zipping up your work and emailing it to yourself or
uploading to dropbox, google drive, etc.
with file names including the date (include at least two images to support
discussion).
Lab
After going
through the first part of the tutorial and installing cadence and libraries, we
can now run Cadence through MobaXTerm.
From here we
change directories by typing “cd CMOSedu” and later
we entering “virtuoso &”. We add the “&” to keep the terminal working
while we are running cadence.
Once cadence
is running we are to create a new library that is going to be called
“Tutorial_1”. (File -> New -> Library)
Once we create
this library we need to add this library into “cdslib”
so that this library can be recognized by cadence.
This is how it
should look after putting it in “cdslib”.
This is the
view of a new cell named “R_div” from the Tutorial_1
library. From this we should hit ok or schematic (second picture) and make the
circuit from the tutorial.
Here is the
circuit from the tutorial which is a voltage divider. This circuit has a
voltage source of 1V, GND refence, and two 10k resistors.
I added all the
components for the schematic by using bind key “I” for instances and bind key “W”
to wire everything together.
Next, we need
to label the nodes that we want to simulated which are “in” and “out”, by using
the Create Wire Name button found on the toolbar.
After making
the circuit we need to fix the aesthetics of the schematic by following the
tutorial.
After drafting
the schematic, we need to save and check the circuit. As shown the circuit
that I have
drafted was checked and completed with zero errors.
Next, we
should hit launch ADE L (Analog Design Environment). This is the resulting
screen that we should be seeing.
We should be
having “spectre” set as our default simulator. Once
this is achieved by following the tutorial we choose our analysis in the
“chose” dropdown menu.
We will be
running a transient analysis for 1 second to observe the “in” and “out” nodes.
As the snip
below shows we have to hit “Outputs -> To Be Plotted -> Select On Schematic”.
This will be
the outputs/inputs that the Cadence analysis will show.
For this
particular circuit we want to simulate the nodes on “in” and “out”. This should
be the resulting screen.
After the screen
looks like this we want to hit the green play button. This will now run our
analysis.
This should be
the resulting screen of the analysis. The results were expected of the “in”
node being 1 V and the “out” node being 0.5V.
We expected
these values because the circuit was a simple voltage divider. I have changed the
background color of the graph and the lines colors,
widths, and
style so it was easier to read.
Backing Up Work
As seen by the
three snips above these were the steps that I used to back up my work. First, I
found the tutorial folder in my CMOSedu folder in the
MobaXTerm.
After finding
where the folder was, I downloaded the folder to the desktop and later sent it
to a compressed zipped folder.
After making a
ZIP file I uploaded them to my google drive with the date in the title. This should complete my backup process. This
will be the process I use in the future.
This concludes
lab 1.