Small softwares for analog IC design

http://www.analogeda.com/

includes:
* CornerTool "is a powerful tool for analog IC designers to run corner simulations with Spectre".

* JMOSCal is to calculate MOSFET curves, e.g., I-V. (Note: requires hspice)

 

Small softwares for analog IC design

Two stage amplifier design tool in matlab

Using inversion coefficient.

http://www.coe.uncc.edu/~yyang29/


 

Two stage amplifier design tool in matlab

Free SPICE simulator from TI

http://focus.ti.com/docs/toolsw/folders/print/tina-ti.html

"without any node or number of device limitations", "loaded with a library of TI macromodels plus passive and active models"

Free SPICE simulator from TI

Better Loop Gain Simulation (with LTspice examples)

http://sites.google.com/site/frankwiedmann/loopgain

Include the LTspice examples using "Middlebrook's General Feedback Theorem", and Tian's Method (the one implemented in stb analysis in Cadence Spectre).

Better Loop Gain Simulation (with LTspice examples)

Optimization tool working together with SPICE?

http://members.aon.at/fschmid7/page_2_1.html

will read more details, including "LTSPICE user group at Yahoo"

Optimization tool working together with SPICE?

Free 0.35 um CMOS model library for LTspice

http://ecee.colorado.edu/~ecen4827/spice.html

LTspice is also free. Thus is good enough for a student to practise analog IC designs.

Free 0.35 um CMOS model library for LTspice

LTspice: free SPICE simulator

http://www.linear.com/designtools/software/ltspice.jsp

Another free spice simulator, provided by Linear Technology.

LTspice: free SPICE simulator

ngspice: free AMS simulator

http://ngspice.sourceforge.net/

"Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is based on three open source software packages: Spice3f5, Cider1b1 and Xspice. Ngspice is part of gEDA project, a full GPL'd suite of Electronic Design Automation tools."

ngspice: free AMS simulator

XCircuit: A free schematic drawing tool

http://opencircuitdesign.com/xcircuit/index.html

It can draw schematic for publication quality, and generate SPICE netlist for simulation.

XCircuit: A free schematic drawing tool

Spice OPUS: a free AMS simulator with optimization capability

http://fides.fe.uni-lj.si/spice/index.html

"SPICE OPUS is a free general purpose circuit simulator specially suited for optimization loops."

"It is a recompilation of the original Berkeley source code for Windows and Linux operating systems. Later Georgia Tech Research Institute's XSpice mixed-mode simulator was added to the Berkeley code. "

Spice OPUS: a free AMS simulator with optimization capability

vSPICE (not open-sourced)

http://ipoint.vlsi.uiuc.edu/vspice/

"vSPICE: SPICE3-based Circuit Simulator with Support for High-Speed Optoelectronic Devices"

No download link was located for vSPICE, yet. Not yet distributed?

vSPICE (not open-sourced)

fREEDA - multi-physics simulator including analog IC simulation

http://www.freeda.org/index.html

"... support for transient, harmonic balance and multi resolution analysis. ... large signal noise analysis captures phase noise ... also supports the integration of EM models in transient analysis. ... including the major transistor models ..."

============================

It can also simulate lasers with rate equations:

R. Pant, M. A. Neifeld, M. B. Steer, H. Kanj, and A. C. Cangellaris, “Electrical package impact on VCSEL-based optical interconnects ;” Optics Communication, Vol. 245, Issue 1-6, Jan. 2005, p. 315-332.

Houssam Kanj, Circuit-Level Modeling of Laser Diodes , M.S. Thesis, North Carolina State University, 2003

fREEDA - multi-physics simulator including analog IC simulation

gEDA project

http://www.gpleda.org/index.html

contains: Schematic Capture, Netlist Generator,  Symbol Library, etc, and...

=========================

"ngspice : An improved SPICE"

http://www.gpleda.org/tools/ngspice/index.html

"Ngspice is a mixed-level/mixed-signal circuit simulator. Its code is based on three open source software packages: Spice3f5, Cider1b1 and Xspice." 

It provides DC, AC, transient, noise analysis, etc.

gEDA project

ZSPICE

http://mot-zspice.sourceforge.net/

pros: use verilog-ams to model devices; highly re-configurable

cons: "Only DC/AC simulations are supported"; "syntax for netlists is NOT of spice flavor".

ZSPICE

A free IC design software: Electric

http://www.staticfreesoft.com/

http://en.wikipedia.org/wiki/Electric_(software)

"Electric is used to draw schematics and to do integrated circuit layout. It can also handle hardware description languages such as VHDL and Verilog."

"Simulation two built-in simulators and interfaces to over a dozen industry tools (Spice, Verilog, etc.)"

A free IC design software: Electric

Free IC design and simulation tool: Qucs, Quite Universal Circuit Simulator

http://en.wikipedia.org/wiki/Quite_Universal_Circuit_Simulator

http://qucs.sourceforge.net

"It gives you the possibility to set up a circuit with a graphical user interface and simulate the large-signal, small-signal and noise behaviour of the circuit."

"Pure digital simulations are also supported using VHDL and/or Verilog."

"Analysis Types:
S-parameter, including noise
AC, including noise
DC
Transient Analysis
Harmonic Balance (not yet finished)
Digital simulation: VHDL as well as Verilog-HDL
Parameter sweeps"

Question:

Where to find model parameters for transistors?

Free IC design and simulation tool: Qucs, Quite Universal Circuit Simulator