SEQUEL main page

SEQUEL

SEQUEL is a general-purpose circuit simulation package developed
at IIT Bombay. It provides a GUI for schematic entry and plotting.
Several simulation examples in electronics and power electronics,
particularly suitable for teaching engineering courses, are included
in the package.

Features

DC, transient, small-signal analysis
efficient "steady-state waveform" computation
digital (event-driven) simulation
mixed-signal simulation
GUI for schematic capture and plotting
free!

SEQUEL examples

Note: The documentation (pdf) files included at the above link are also
included in the SEQUEL distribution. There is no need to download
them separately.

Using SEQUEL for teaching

A large number of ready-made simulation examples are made available
with the SEQUEL distribution. They can be used in courses on electronics
and power electronics in a variety of ways:

class-room demonstration of basic concepts by running exisiting
examples in class
assigning simulation exercises in which students tinker with
parameter values and observe its effect on simulation results
("active learning")
assigning design problems (for which simulation can be used
as a verification tool)
assigning class projects in which students design and simulate
a complex circuit or system

Downloads

SEQUEL distribution for Windows
SEQUEL distribution for Ubuntu (64-bit)
GUI
SEQUEL engine
Slides on circuit simulation
Techniques for circuit simulation
Circuit simulation: transient analysis

Video tutorials: (download and view with VLC media player)

SEQUEL Users' Manual

Instructions for running SEQUEL (Windows)

Extract files to a directory of your choice (say, xyz) preferably
on D: or E: drive, and not on the Desktop or C:.
Change to directory xyz.
Run the executable file, SequelGUI2_Release\SequelGUI.exe.
Follow the video tutorial on RC circuit to get started.
Caution: Do not create a short-cut for running Sequel. It may
create file access issues.

Instructions for running SEQUEL (Linux: 64-bit)

copy sequelx_linux.tar.gz to your home directory

cd ~

tar zxvf sequelx_linux.tar.gz

chmod -R 777 sequel_fixed

Extract GUI files to a directory of your choice (xyz) as follows.
cd xyz
tar zxvf SequelGUI2x_linux.tar.gz

cd xyz/SequelGUI2_Release

./SequelGUI2

Follow instructions in the manual to run an exisiting project or create a new project.
SEQUEL feedback form
Course material (Electronics): slides, notes, animations, lab sheets
Video lectrures for NPTEL on-line course on Basic Electronics
SequelApp for classroom teaching
GSEIM (open-source ODE solver package)
Video lectures based on SEQUEL/SequelApp simulation
Related Publications
1. "Simulation of Power Electronic Circuits,"
  by M.B. Patil, V. Ramanarayanan, V.T. Ranganathan, Narosa, 2009.
2. Errata for the above book.
3. M. B. Patil, "A public-domain program for mixed-signal simulation,"
  IEEE Trans. Education, pp. 187-193, May 2002.
4. M. B. Patil, S. P. Das, A. Joshi, and M. C. Chandorkar, "A new
  public-domain simulator for power electronics circuits,"
  IEEE Trans. Education, vol. 45, pp. 79-85, Feb. 2002.
5. D. Vinay Kumar, R. A. Thakker, M. B. Patil, and V. R. Rao,
  "Simulation study of non quasi static behaviour of MOS transistors,"
  Proc. 5th Intl. Conf. on Modeling and Simulation of Microsystems,
  San Juan, Peurto Rico, April 22, 2002.
6. M. B. Patil, M. C. Chandorkar, B. G. Fernandes, and K. Chatterjee,
  "Computation of steady-state response in power electronic circuits,"
  IETE J. Research, vol. 48, no. 6, pp. 471-477, Nov. 2002.
7. Dennis Sasikumar, R. Manchanda, and M. B. Patil,
  "The role of dendritic spines in EPSP amplification: a
  computational pilot study using a novel simulation platform,"
  Int. Symp. Neuroscience, Manesar, India, Dec 15-17, 2003.
8. D. Vinay Kumar, K. Narasimhulu, M. Shojaei-Baghini,
  D. K. Sharma, M. B. Patil, and V. R. Rao, "Evaluation of
  the impact of layout on device and analog circuit performance
  with LAC MOSFETs," IEEE Trans. Electron Devices, vol. 52,
  pp. 1603-1609, 2005.
9. S. N. Agarwal, A. Jha, D. Vinay Kumar, J. Vasi, M. B. Patil, and
  S. C. Rustagi, "Look-up table approach for RF circuit simulation
  using a novel measurement technique," IEEE Trans. Electron Devices,
  vol. 52, pp. 973-979, 2005.
10. B. P. Harish, N. Bhat, and M. B. Patil, "Analytical modeling of CMOS
  circuit delay distribution due to concurrent variations in multiple
  processes," Solid-State Electron., vol. 50, pp. 1252-1260, 2006.
11. B. P. Harish, N. Bhat, and M. B. Patil, "On a generalized framework
  for modeling the effects of process variations on circuit delay
  performance using response surface methodology," IEEE Trans. CAD,
  vol. 26, pp. 606-614, 2007.
12. R. R. Sawant and M. C. Chandorkar, "Methods for multi-functional
  converter control in three-phase four-wire systems," IET Power Electronics,
  vol. 2, issue 1, pp. 52-66, Jan. 2009.
13. R. R. Sawant and M. C. Chandorkar, "A Multifunctional Four-Leg
  Grid-Connected Compensator," IEEE Trans. Industry Applications,
  vol. 45, pp. 245-259, 2009.
14. R. A. Thakker, C. Sathe, A. B. Sachid, M. S. Baghini, V. R. Rao,
  and M. B. Patil, "Automated Design and Optimization of Circuits in
  Emerging Technologies," Proc. 14th Asia and South Pacific Design
  Automation Conf., Yokohoma, January 19-22, 2009.
15. R. A. Thakker, C. Sathe, A. B. Sachid, M. S. Baghini, V. R. Rao,
  and M. B. Patil, "A Novel Table-based approach for Design of FinFET
  Circuits ," IEEE Trans. CAD, pp. 1061-1070, July 2009.