Support for Verilog-A transition() function

[ODGrip]

Hi,

I noticed that the Verilog-A function "transition()" is currently not supported by OpenVAF.

In practice, this function is widely used in behavioral modeling to smooth piecewise-constant signals and avoid hard discontinuities in analog equations. This is especially important when modeling digital-like control signals inside analog blocks, where ideal step transitions often lead to convergence issues

Is there any roadmap for implementing it, or a recommended workaround that provides similar numerical behavior?

Thanks for your work on OpenVAF

[gjcoram]

transition() is tricky to implement, if you properly handle the cases when transitions are interrupted. And I think OpenVAF is intended for compact models, which should never use the transition() operator.

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On Sun, Feb 22, 2026 at 1:30 PM ODGrip ***@***.***> wrote: *ODGrip* created an issue (OpenVAF/OpenVAF-Reloaded#12) <#12> Hi, I noticed that the Verilog-A function "transition()" is currently not supported by OpenVAF. In practice, this function is widely used in behavioral modeling to smooth piecewise-constant signals and avoid hard discontinuities in analog equations. This is especially important when modeling digital-like control signals inside analog blocks, where ideal step transitions often lead to convergence issues Is there any roadmap for implementing it, or a recommended workaround that provides similar numerical behavior? Thanks for your work on OpenVAF — Reply to this email directly, view it on GitHub <#12>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACYQ2FRFVMK5Q7Y7J44EQIL4NHYSXAVCNFSM6AAAAACV37MFKCVHI2DSMVQWIX3LMV43ASLTON2WKOZTHE3TKMJXGY4TGMI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>