Custom nonlinear components

[gehrer]

Custom nonlinear components

[gehrer]

Thank you. Works well now.
Another question: According to the documentation the step size is controlled and probably gets adjusted during the transient simulation. Is there an easy way to force a step size? I sometimes have the problem that an error "Step size too small" occurs, independently of the start step size.

[itdaniher]

Hi @gehrer, can you gist the code that produces this error? I'm not an expert in ahkab internals, but as close as there is to a maintainer at this point. If you share your code, I'll try and take a look.

Good luck!

[gehrer]

Hi,
here is the link to the gist:
https://gist.github.com/gehrer/12c8228b245b21eeaa0a0071127c5e1e

[itdaniher]

@gehrer thanks, I'll take a look ~tomorrow. Merry Christmas!

[itdaniher]

@gehrer take a look at https://github.com/ahkab/ahkab/blob/master/ahkab/diode.py#L87, https://github.com/ahkab/ahkab/blob/master/ahkab/diode.py#L125

Looks like it's just part of the API that the above code missed.

[itdaniher]

try https://gist.github.com/itdaniher/b595075f30c9db440b0409c9b16f835d

looks like nonlinear elements requires a different API than for linear, I tried to make changes as appropriate.

Look at the diode.py source, esp class diode.

regards!
Ian

[itdaniher]

wrt step size:

transient_analysis has the following parameter:

use_step_control: the LTE will be calculated and the step adjusted. default: True

pretty sure setting it to false will use a constant step size.

you can also set a smaller value for options.hmin, the smallest allowed step size.

Regards,
Ian

[itdaniher]

Closing this issue as the primary question was addressed - feel free to open another issue if needed!

Regards,
Ian