EE Software Links

Other sites for electrical engineering shareware
Symbolic Circuit Simulation from
The Engineers' Club
Impressive site by John Wethrell
RF and Wireless Design Center
Sector Systems Company Shareware Listing
Bjorn Starmark's Electronic Related Links
Delaware Tech's Software (including Pspice)
Devry's IEEE Student Chapter Favorite Links
Brent Hefner's Electrical Engineering Page

Commercial software for electrical engineering
Capilano Computing Excellent schematic capture and simulation software for Mac and Windows
AADE Filter Design and Analysis
Eagleware Home Page
Company Adddresses and Software Descriptions
ALK Engineering (S/Filsyn)
Electromagnetic Software
HP's EEsof, Touchstone, MDS, Libra
Mini-NEC Antenna Design Software

Other Links

PCBexpress-Printed Circuit Board, Board Fabrication Provides prototype circuit board manufacturers, PCB prototype stencils, motherboards, Printed Circuit Board Manufacturers, pcb manufacturer and PCB prototype.
Dusbin Excellent links to other links
4DQ Interesting Circuits
Notre Dame IEEE
Stanford IEEE This page has some super links to industry and other colleges!!!
Links to Stanford CIS, LabnetSoftware, National Nanofabrication Users Network, Semiconductor Subway
University of Illinois IEEE
UT Austin IEEE
Ben Streetman The man, the legend
Tech Web News
EE Times
Electrical Engineering Circuits Archive
Educational Java Applet Service- This is a high quality piece of work that anyone studying Solid State Electronics should be certain to check out! Great Work Prof C.R. Wie
A bunch of Electronics Links
Electronics Info Page
Electrnics Links
Electronic Kits Page
Robert J. Kelley's Bookmarks (please ignore the non EE links!!!)
Electronics Hobbyist Links Information on Si Investments
Electronics Information Online

More Software

Educational, Archive and FAQ sites

Commercial Sites

Please note: Some of these sites want to sell you stuff. They may have wonderful resources or be lying dogs trying to rip you off: we do not endorse anything by putting a link here. If you have trouble with any vendor listed here please send me E-mail.

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Filter Design

  1. S/FilSyn (PCFilt) from ALK Engineering: This PC demo version only works at one frequency, 833MHz (frequency translation is easy to do by hand, so the demo can easily be used for any design with a little thought!). The demo is pretty good. The interface is good, but not as good as MicroSim's software. They will give you a full version for 30 days. They claim it's the best filter software around.
  2. Filtroid from GigaSim: $995, The demo is pretty bad, but it's still worth a try.
  3. MicroSim Filter Designer Software: This PC demo version only allows upto third order filters to be designed. It has a great user interface. The full version is $750.  Microsim was bought by OrCAD.
  4. Burr_Brown Filter Designer Software: A good simple filter designer for any order filter...and it's FREE!
  5. Interactive Filter Design Software: CGI script that finds filter poles and zeros and transfer function. Very similar to MATLAB's filter design routines (more analysis than synthesis).
  6. filtorX: A simple filter design tool. I see no advantage over MATLAB. You also have to mail in an agreement to use it (too much work).
  7. FilterMaster: A full working demo of Intusoft's filter design software. This isn't the real program, but a great demo:$2225, $335/year maintenance, $1195/per person for 2 day training.
  8. Xfilt:  An Academic Filter Design Tool.  You have to contact the school to get a copy.  I'm not sure of the quality, but it has good variety of analog filter synthesis options.
  9. Cadence's Filter Design System. This is a digital filter synthesis tool.  No analog...booo!, but it's from Cadence, so I assume it's of good quality, and has some finite coefficient length tools.
  10. University of Illinois Filter Synthesis Class.  Some MATLAB routines for filter synthesis.
  11. Max Froding's Butterworth Filter Synthesizer.  Design 2 to 25 element Butterworth lowpass and highpass filters from your internet browser.
  12. MIMICAD Filter Synthesis.  A Commercial Filter Synthesis Tool.  This webpage isn't very good.
  13. Electronic Filter Synthesis and Analysis.  A book on filter synthesis.
  14. LADDER, A University of Wyoming Filter Synthesis Tool.  I think it is free.
  15. Serenade, Ansoft's Filter Synthesis Routine.  I think it's cheap for universities.
  16. superFILTER, Tatum Lab's Filter Design Software.  Both digital and analog. Standard is $795 and Pro is $1995.  It has a good simple demo.  It's good, but it looks like it's topologies are limited.
  17. Filter Wiz, Standard is $89 (students-$38), Pro is $199(students-$84),  A good cheap program with a good interface, but it's topologies are limited to biquads, which are more sensitive to process variations.
  18. FaiSyn, A simple very-inexpensive filter design tool.  It has limited capabilities, but it does the job for the right price:  Corportate is $89, single-user $35.
  19. Adore, A module(op-amps, switches, capacitors) generator for switched capacitor filters from Berkeley.Adore. $150 for distribution costs.
  20. Eagleware's FILTER.  $699 Eagleware has a complete suite of filter design tools including active and transmission line based tools, but charges another $699-$999 for each product.

RF Design Tools

  1. Spur Chart Calculator: Useful for defining the specifications of RF filters.
  2. Cascaded Block Analysis: A tool for analyzing a cascade of nonlinear noisy blocks. It costs $15, but don't buy it. It is very easy to write yourself in something like EXCEL. The next link is a Java program that does the same thing.
  3. ANADIGICS Receiver Model Tool: A decent web based tool for receiver block analysis.
  4. PUFF: CAD for Microwave Circuits: You have to pay for it, so I have no idea how well it works. There are no examples on the webpage.
  5. Spectrum Allocation Chart: At first glance it looks like a great chart, but it really doesn't give you much needed information.

Impedance Matching Network Design

  1. MATCHER, An Impedance Matching Network Design Webpage(now with 16 networks!), written in JavaScript/HTML.
  2. High Q and Broadband Matching Program, software developed by a ham radio operator.
  3. Impedance Matching Networks: Describes why's and how's of impedance matching. The author claims to have a C program (looks like Mathcad from the pictures), but it's not available from his homepage. You can send him an email, I suppose.
  4. MIMP:  Motorola's Impedance Matching Software.
  5. 2-Element Matching, a two-element matching program by Xuesong Jiang.

Phase Locked Loop Design

  1. 3rd Order PLL Design Software: A useful DOS program for designing a 3rd order PLL loop filters.
  2. 2nd Order PLL Design Software: A useful DOS program for designing a 2nd order PLL loop filters.
  3. 3rd Order PLL Loop Filter Designer: A fast simple Java routine for designing 3rd order PLL loop filters
  4. Phase Locked Loop Design and Analysis, Fall 1997 NTU Seminar, Postscript File. This is seminar I gave on phase locked loop design.
  5. Eagleware PLL Design: PLL synthesis software. I'm sure it's expensive.
  6. National's PLL Design Software: Oh Boy! This is some good stuff.

Passive Element Design (Inductors, Substrate Isolation, etc.)

  1. ASITIC: Analysis and Simulation of Spiral Inductors and Transformers for ICs. A very good passive component design and analysis program. Useful for analysis of any multilayer planar structure (inductors, capacitors, substrate isolation, etc.) Ali's Homage has more information on ASITIC
  2. Stanfg
  3. Magnetics Designer: A full featured transformer and inductor design software from Intusoft. This isn't the real program, but it is a great demo.
  4. MID: Magnetic Inductor Designer
  5. Stanford Spiral Research

Operational Amplifier Design

  1. Automated Switched Capacitor Integrator Designer: This is preliminary synthesis program I designed. Pole-zero cancellation doesn't work ideally, because of process variations, so I'm modifying the program for a better architecture. In any case I hope you find it helpful. I also have a Mathcad version of the routine.
  2. Basic Op-Amp Transfer Functions: A simple discussion of operational amplifier transfer functions.
  3. Operational Amplifier Projects:
    1. John Wetherell's 240 Project
    2. Kelvin Koo's 240 Project
    3. Xuesong Jiang's 240 Project
    4. David Sobels's 240 Project
    5. Ning Zhang's 240 Project
    6. Roy Sutton's 240 Project
  4. Low Voltage Operational Amplifier Design: Andy Abo's qualifying exam includes low voltage operational amplifier design techniques. Check out his homepage too!
  5. Power Design: An automated operational amplifier design tool.

Analog-Digital and Digital-Analog Converter Design

  1. MIDAS: Mixed Digital/Analog Sampled-Data Simulator. Good for sigma delta modulator design.
  2. Richard Schreier's Delta Sigma Toolbox, A great collection of design tools for sigma delta modulators, I find the coefficient sizing works great except for cascade and multibit modulators.
  3. Arnold Feldman's Ph.D. Thesis: includes a good comparison of different operational amplifier architectures. It has a thorough analysis of integrated operational amplifier noise. Check out his homepage too!
  4. A 10.6mW 1MHz Fifth-Order Multiple-Bit Sigma-Delta Modulator, class project, EE247, SP96
  5. A Compact Low Power Decimation Filter for Sigma Delta Modulators , class project, EE241, SP97
  6. Low-Power Decimation Filter Design for Multi-Standard Transceiver Applications: A good thesis on decimation filter design.
  7. Decimation Filter Publications: A good discussion of decimation filter design with binary constrained coefficients.
  8. Automated DAC design: Robert Neff did his thesis on the automated design of current source DACs.
  9. Ecstasy: An automated analog IC design routine.
  10. SCADS: Automated Fitler and Pipelined A/D Converter Design.  I don't think the pipelined A/D converter is available yet.  The filter design tool is integrated into Cadence and seems very powerful (i.e. transistor sizing), but I haven't tried it.  I've found most of these tools to be very heavily analysis based with little synthesis capabilities.


  1. Olympus Digital Design Software from Stanfurd.

Radio Frequency and IC Design

  1. Analog Integrated Circuits at Berkeley: This is the homepage for analog integrated circuit design at Berkeley.
  2. Aalborg University, DK: Has some interesting research and nonlinear noise software.
  3. Integrated Circuits at UCLA: Also interesting work on CMOS receivers.
  4. Issues in RF IC Design: A short course on RF IC design.
  5. Stanfurd's Integrated System's Lab: Work on a variety of integrated circuits, including CMOS RF.
  6. CDADIC: Center for design of analog-digital integrated circuits. Limited to only a few local universities, but the name implies a larger scale.
  7. Microsystems Technology Laboratories: A variety of good research at MIT.
  8. Hong Kong University Online RF Design Textbook:  A good primary online text book for RF design.

Free Electrical Engineering Software Pages

  1. Static Free Software, A FREE Schematic Entry Tool
  2. Electronic Engineering Technology Software Site: This has small but good selection of software tools for radio frequency design.
  3. The Free SPICE Index: An extensive list of free SPICE programs.
  4. Tony Fishers Circuit Simulator: An interesting online circuit design software. I prefer Microsim or Cadence like schematic entry.
  5. Electrical Engineering Circuits Archive: A collection of simple circuits and software.
  6. RF Globalnet: A great collection of RF magazine articles and software. Membership is free and worth filling out the forms. Software: Tons of good software on RFglobalnet.
  7. Ballistic: An analog layout software. I haven't used it, but I've heard good reviews.
  8. Electrical Engineering Circuits and Software Archive: An extensive collection of software.
  9. National's Simple Switcher: A DC-DC converter design software.
  10. Bob Pease's Bandgap Design: A great discussion on bandgap design.

Not-so-Free Electrical Engineering Software

  1. Eagleware: RF design software.
  2. Tanner Tools:  Lower cost complete substitute to Cadence.
  3. Rf Globalnet software: A good listing of commercial software.
  4. Spectre/XL: Seems like a great PC-base software tool. I know the UNIX version is great. Does nonlinear noise analysis for oscillators, PLL's, mixers, etc. and interfaces with Excel. No schematic capture. $1250 w/o nonlinear noise, $2k w/nonlinear noise.
  5. Electronics Workbench, Full Simulator, Educational Version, $199.
  6. Evaluation of communication system software by EDN Magazine.
  7. Electronic Design Automation Software, compilation by EETimes.

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