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Modeling >> Semiconductor Devices >> VHDL-AMS VBIC model?
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Message started by the_pd on Sep 16^th, 2011, 4:09pm

Title: VHDL-AMS VBIC model?
Post by the_pd on Sep 16^th, 2011, 4:09pm

I am in need of a VHDL-AMS VBIC implementation. So far, it looks like Verilog-A is the language of choice, however. Anyone know where I could find a VBIC model in VHDL-AMS? Thanks!

Title: Re: VHDL-AMS VBIC model?
Post by loose-electron on Sep 18^th, 2011, 1:45pm

Strange mix of platfoms.

Verilog A or AMS is generally used for functional level models, not transistor level models.

If you need to simulate at the transistor level, perhaps you should consider using a EDA platform with a Spice-Spectre type of simulator?

Title: Re: VHDL-AMS VBIC model?
Post by Geoffrey_Coram on Sep 19^th, 2011, 8:20am

loose-electron wrote on Sep 18^th, 2011, 1:45pm:

Verilog A or AMS is generally used for functional level models, not transistor level models.

Jerry - You've missed the revolution in transistor-level compact modeling: almost all the latest transistor models (PSP, BSIMSOI, VBIC, Mextram, Hicum, ... and soon BSIM6) are written/developed in Verilog-A. Spectre, HSpice, Eldo, etc. all have Verilog-A compilers. The users can then modify the source code to add new equations / model features.

That said, it is Verilog-A; I can't recall ever seeing a compact model written in VHDL-AMS, other than maybe a basic diode as an example. Verilog-AMS added a bunch of features to the language in LRM 2.2 to make compact modeling easier, and that's where the developers have gone.