EE 421L
Digital
Integrated Circuit Design Laboratory
Laboratory
Report 1: Laboratory Introduction, Generating/Posting HTML Lab Reports,
Installing and Using Cadence
AUTHOR:
Bryan Kerstetter
EMAIL:
kerstett@unlv.nevada.edu
SEPTEMBER
4, 2019
General
Overview
This laboratory regards the introduction of editing
webpages in HTML on CMOSedu. While also explaining
the installation process of Cadence and a basic introduction to the software.
Prelab
Drafting laboratory reports in HTML was reviewed from
my experience in EE 420L
this past spring. I requested a CMOSedu
account from Dr. Baker for this laboratory. I also created a Laboratory
Report Repository on CMOSedu to store all my HTML Laboratory reports for
this laboratory.
Description
of Laboratory Procedures
1.
Installing
Cadence
I followed the “Help Using Remote
X for UNLV Students” on CMOSedu. I first downloaded MobaXterm
and installed the software.
Figure 1
A Cadence account was created, and a password was set.
The following command was entered to access my account on the UNLV ECE Cadence
server:
ssh -Y kerstett@csimcluster.ee.unlv.edu
The Linux command, ssh
(Secure Shell), is a network protocol that can be used to access a
computer in a secure manner over an unsecure network.
Figure 2
Once my account on the UNLV ECE Cadence server was
accessed, I went ahead and download the NCSU Cadence Design Kit (CDK)
Version 1.6.0 Beta.
Figure 3
Figure 4
I downloaded the tar file given by the NCSU EDA
website entitled:
NCSU-CDK-1.6.0.beta.tar
I then moved that tar file to my home directory and
extracted the tar file as seen in Figure 5.
Figure 5
I extracted the archive by using the following commands:
tar -xvf NCSU-CDK-1.6.0.beta.tar
tar -xvf ncsu-cdk-1.6.0.beta.tar.gz
A directory was then made by using the following
command:
mkdir CMOSedu
The following copy command was executed:
cp
-a $HOME/ncsu-cdk-1.6.0.beta/cdssetup/.
$HOME/CMOSedu/
Everything was copied from the directory $HOME/ncsu-cdk-1.6.0.beta/cdssetup to the directory $HOME/CMOSedu
as
evidenced in Figure 6.
Figure 6
The files cdsinit, simrc,
and cdsenv were
renamed to .cdsinit, .simrc,
and .cdsenv (added period to beginning).
Figure 7
The cadence libraries were located and then I went to
the CMOSedu directory that was recently created. I added the following three DEFINE
statements to the cds.lib file in the CMOSedu
directory.
DEFINE
analogLib /share/apps/cadence/IC615/tools.lnx86/dfII/etc/cdslib/artist/analogLib
DEFINE
functional /share/apps/cadence/IC615/tools.lnx86/dfII/etc/cdslib/artist/functional
DEFINE sbaLib /share/apps/cadence/IC615/tools.lnx86/dfII/etc/cdslib/artist/sbaLib
Figure 8
The .bashrc file
in the home directory was accessed and the following Bash export commands were
added to the file.
export
SPECTRE_DEFAULTS=-E
export CDS_Netlisting_Mode=Analog
export CDS_LOAD_ENV=CWDElseHome
export CDK_DIR=$HOME/ncsu-cdk-1.6.0.beta
Figure 9
Next we downloaded the Cadence_IC61_CMOSedu.zip
and moved the zip file to our CMOSedu directory in our Home directory. Then we
added the 40 DEFINE statements in cds_lib_IC61.txt
to the bottom of the cds.lib file. Such that the
cds.lib file looks like what is seen in Figure 10.
Figure 10
Finally, we may open the Cadence Virtuoso design
environment by typing the following command while in the CMOSedu directory:
virtuoso &
Cadence’s
Command Interpreter Window (CIW) then opened as seen in Figure 11.
Figure 11
Cadence’s Library Manager can be seen below in Figure
12.
Figure 12
2. Using
Cadence
This following section is
following Tutorial
One: Layout and Simulation of a Resistive Voltage Divider on CMOSedu,
up to the 25th image (the first transient simulation of the
resistive voltage divider). A library with the name of Tutorial_1 was
created as seen in Figure 13. The technology library that was chosen was the AMI
0.60u C5N (3M, 2P, high-res).
Figure 13
Looking at cds.lib,
file we can see that the following line is included:
DEFINE
Tutorial_1 /home/kerstett/CMOSedu/Tutorial_1
Figure 14
A created a simple resistive
voltage divider in Cadence as seen in Figure 15.
Figure 15
It was ensured that Spectre was the simulator
selected.
Figure 16
A transient simulation with the following parameters
was executed.
Figure 17
The results of the transient simulation can be seen
below in Figure 18. The resistive voltage divider is confirmed to have worked.
Figure 18
The library used for this laboratory was backed up on
Google Drive. I have Google
Drive’s File Stream installed so that I can easily upload files to
my Google Drive. I will ensure that all my work that I have done in this
laboratory is backed up.
Figure 19: Backed up on Google Drive’s File Stream
Figure 20: Backed up on Google Drive
Return to EE
421L Fall 2019 Page
Return to Dr. Baker’s CMOSedu homepage
