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Cadence Virtuoso Tutorial
version 6.1
University of Southern California
Last Update: Oct, 2015
EE209 – Fall 2015
Table of Contents
System Setup ......................................................................................................................................................... 3
1.
Basic setup ...................................................................................................................................................... 3
2.
Cadence setup ................................................................................................................................................. 3
Basic Design Flow .................................................................................................................................................. 5
1.
Overall design flow ........................................................................................................................................... 5
2.
Create Library .................................................................................................................................................. 6
3.
Schematic ........................................................................................................................................................ 8
A.
Create a cell view ........................................................................................................................................ 8
B.
Draw a schematic ........................................................................................................................................ 9
4.
Run Spectre simulation (Transient analysis) ................................................................................................... 16
A.
Launch ADE (Analog Design Environment) L ............................................................................................. 16
B.
Basic setup ................................................................................................................................................ 17
C.
Model Libraries .......................................................................................................................................... 17
D.
Stimuli ....................................................................................................................................................... 18
E.
Choose a type of analysis - transient ......................................................................................................... 20
F.
Select signals to plot .................................................................................................................................. 21
G.
Run simulation ........................................................................................................................................... 21
H.
Measurement ............................................................................................................................................ 22
5.
Run Spectre simulation (DC analysis) ............................................................................................................ 25
A.
Voltage Source .......................................................................................................................................... 25
B.
Replace Input Pin ...................................................................................................................................... 26
C.
Choosing Analyses .................................................................................................................................... 26
D.
Run Simulation .......................................................................................................................................... 27
6.
Layout............................................................................................................................................................ 29
A.
Create a layout .......................................................................................................................................... 29
B.
Add an instance - nmos ............................................................................................................................. 30
C.
Add more instances – pmos, ptap, ntap, and m1_ploy ................................................................................ 31
D.
Draw metal1 .............................................................................................................................................. 32
E.
Run DRC ................................................................................................................................................... 33
F.
Add pins .................................................................................................................................................... 35
G.
Extract ....................................................................................................................................................... 37
H.
Run LVS .................................................................................................................................................... 38
I.
Run Spectre simulation ................................................................................................................................ 39
System Setup
Basic setup
Cadence can only run on the unix machines at USC (e.g., viterbi-scf1). You will need to
remote login (XTerm) to these machines to run the tools.
If you’re using Windows, download X-Win32 2012 (for remote login) and Filezilla (for file transfer)
from http://software.usc.edu (usc account login required)
If you’re using MAC or Ubuntu, use terminal command “ssh -X” for remote login and “scp” or
“sftp” for file transfer. If you’re not familiar, please read this tutorial for more information:
http://www.linuxtutorialblog.com/post/ssh-and-scp-howto-tips-tricks
If you have any license issues when you run X-Win32, you can either try to connect to USC
Wireless Plus (how-to link: http://www.usc.edu/its/wireless/plus/) or use USC VPN (how-to
link: http://www.usc.edu/its/vpn/anyconnect.html).
a) X-Win32 Connection Setup
To remote login using X-Win32, select Manual and choose ssh:
Connection Name: (anything you like)
Host: viterbi-scf1.usc.edu
Login: (your my.usc.edu account name)
Command: /usr/bin/xterm
Password: (your my.usc.edu account password)
Save your connection. Launch it:
If you see the xterm window like below, congratulations your X-Win32 is all setup.
b) Filezilla Connection Setup
Open Filezilla, use viterbi-scf1.usc.edu as host and 22 as Port. The username and password
are the same as your X-Win32 connection.
Navigate and choose files from the left window to upload and files from the right window to
download.
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