Nagendra Krishnapura-EE539, Jan-May 2006: Schedule/Assignments

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Analog Integrated Circuit Design, Jan-May 2006

Assignments
Assignment submission
Simulation resources
Syllabus and schedule
Lecture notes

Assignments

Basic MOS circuit analysis: HW1
MOS small signal parameters and mismatch: HW2
Noise: HW3
Common source amplifier and source follower: HW4
Amplifier circuit analysis: HW5
Single ended opamp design: HW6
Differential opamp design: HW7

Assignment submission

Submit all solutions by email as a single pdf file.

You can use a wordprocessor of your choice and convert the result to a pdf file.
A quick way to generate a pdf is to concatenate ps(postscript) files containing all figures and text(use enscript to convert text to ps) to a single ps file. Run ps2pdf on this file to get a pdf file.
enscript -p p1.txt.ps p1.txt
enscript -p p2.txt.ps p2.txt
cat p1.txt.ps fig1.ps p2.txt.ps fig2.ps > out.ps
ps2pdf out.ps eexxxxxx_hw01.pdf
Name your file with your id as eexxxxxx_hw01.pdf so that it is easier for me to keep track of.
Put your name and roll number on the first page.
Regardless of the order in which you do the problems, rearrange the solutions in the right order in the submission.

Simulation resources

Tools

Xcircuit is an open source tool for circuit netlisting. It is also an excellent tool for drawing publication quality circuits. Download the latest version of Xcircuit here. You might want to go through the schematic capture tutorial in order get familiar with the netlisting process. If you use machines in FPGA/VLSI/IE labs, check to see if Xcircuit is already installed.
Eldo is a circuit simulator from Mentor Graphics. The Institute has purchased 50 floating licenses of this simulator for class use. The binaries are installed in the DCF as well as the FPGA and IE labs. Feel free to copy them to your hostel Linux PCs. Eldo works like any other SPICE, so if you are familiar with SPICE netlisting, it should be smooth sailing. To simulate a circuit, create it in Xcircuit and generate a netlist. Add the required analysis commands and include the MOS model files to get going. An extensive Eldo user guide (eldo_ur.pdf) should help point out the powerful features of the simulator. This guide (and others) can be found in the $anacad/documentation directory. To setup Eldo, see below.
Xelga This is a waveform viewer from Mentor Graphics that understands Eldo output. Use this to plot your simulation outputs. A users guide (and others) can be found in the $anacad/documentation directory.
MOS models(0.18µm CMOS, 1.8V supply unless otherwise mentioned):
- 0.18µm model file
- 0.18µm process information.
- Add the following line to your netlist to use these models with Eldo
  .option compat

Setup

Log on to the department ftp/ssh server 10.7.0.1 (athreya). Copy the directory /pub/mentor to some convenient location (/tools directory, if you have so) in your machine.
Add the following line to your /etc/hosts file
10.65.0.45 moon.cc.iitm.ernet.in moon
Add the following lines to your startup script in your home directory

For csh or tcsh: ~/.cshrc
# ANACAD BEGIN #########################
# ANACAD SOFTWARE Initialization
setenv anacad /tools/mentor # (change as necessary. It is /pub/mentor in DCF)
source $anacad/com/init_anacad
# ANACAD END #########################
setenv LM_LICENSE_FILE 1717@10.65.0.45
set path = ($anacad/bin $path)

For zsh/bash: ~/.profile or ~/.bashrc
# ANACAD BEGIN #########################
# ANACAD SOFTWARE Initialization
export anacad=/tools/mentor # (change as necessary. It is /pub/mentor in DCF)
source $anacad/com/init_anacad.ksh
# ANACAD END #########################
export LM_LICENSE_FILE=1717@10.65.0.45
export PATH=$anacad/bin:$PATH

For those who want to use the tool in DCF/FPGA Lab/IE Lab, follow the same procedure except steps 1&2.

Troubleshooting

If Eldo does not fire up : First make sure that the environment variables are properly set.
If Eldo complains about licenses : check if your machine is able to reach the license server (moon.cc.iitm.ernet.in or 10.65.0.45). If moon is not reachable, contact your network administrator.
If moon is reachable, but you are unable to run Eldo, run "lmstat -c 1717@moon" from your command line. If the result is that the license server is running, it means that your environment variables are not properly set. If the license server is dead, please contact Mr.S.K.Ramesh at the Computer Center (Phone 4980).
If Eldo crashes complaining about the kernel version, add the following line to .cshrc(and source it)
setenv LD_ASSUME_KERNEL 2.4.1

Syllabus(Schedule)

Motivation; MOS device basics(1 week)
Small signal equivalent circuit(0.5 week)
Components available in an IC(0.5 week)
Mismatch(0.5 week)
Noise in MOS transistors, resistors(0.5 week)
Single transistor stages-CS, CG, CD(1 week)
Single transistor stages with resistive feedback-Emitter degeneration, Transimpedance(1 week)
Differential amplifier(1.5 weeks)
Multistage amplifiers(0.5 week)
Negative feedback(1 week)
Bandgap reference generator(1 week)
IC layout and packaging(0.5 week)
Bipolar ICs(1 week)

Caveat downloader: These are brief transcripts of the lectures. They are not meant to be detailed descriptions as in a text book.

Overstrike means that there was no lecture on that day. No link means that there no notes for that day (yet).