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There are plenty of free SPICE and Verilog simulators out there such as LTSPICE or TINA or even WinSPICE. There are also several Verilog simulators as well. However, I am looking for free VerilogA simulators. Does anyone know one?

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    \$\begingroup\$ I don't have an answer, but we've had some requests for adding Verilog-AMS (which includes Verilog-A) into CircuitLab. We've already made a significant effort to support behavioral sources in our simulator. Can you give a few examples of what kinds of systems you are looking to simulate? Do you have existing VerilogA models? \$\endgroup\$ – compumike Jul 14 '12 at 22:18
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The GPL spice simulator Ngspice has an extension called ADMS that compiles Verilog-AMS code into C code that works with the API used by spice simulators. So you'd end up with something that could be compiled into an executable that a spice simulator (like Ngspice) could simulate.

Since Verilog-A is apparently just a subset of Verilog-AMS, this may suit your needs.

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you may find what you are looking for :

http://atelecad.free.fr/

Advance Spice + Model Verilog A Compiler Build In -> a lot of improve features -> with New advanced Verilog A features to ensure convergencies ( Model Init & Limit Functions)

Schematic Capture ( 2 versions Xlib + Motif) Logic Simulations

etc ....

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you should try Dolphin Integration's SMASH it is free or you should try VeriWell simulator

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    \$\begingroup\$ Did you try them? Could you give some details about your experience with these tools? \$\endgroup\$ – clabacchio Mar 23 '13 at 11:39
  • \$\begingroup\$ Dolphin isn't free, and Veriwell doesn't do analog. At all. \$\endgroup\$ – EML May 12 '14 at 8:34

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