sweeping a value over time in LTSpice

[dentaku]

I know about using .step param in LTSpice but it ends up running multiple simulations and then overlapping them.
I'd like to sweep the value of a pot over time in steps and run the simulation for a certain amount of time in one long pass.
For example, this is what I get at the moment and it's not what I'm looking for.

[c4757p]

LTspice can do time-dependent resistors directly! Just set resistance equal to a function of time:

Code: [Select]

R=1k*time

Preferable to the dependent source method, which I've found to occasionally cause convergence issues.

[dentaku]

Well, I think I got it.
I now have the pitch being swept over time instead of in steps over multiple simulations. I had to replace the pot with just two resistors again.

LTspice can do time-dependent resistors directly! Just set resistance equal to a function of time:

Code: [Select]

R=1k*time

Preferable to the dependent source method, which I've found to occasionally cause convergence issues.