Clyde

NGSPICE seems pretty industrial grade to me. All of the other SPICES leave bits out.

Dietmar, Thank you for humoring me with the reply in the hijacked thread. What I set out to do was to see how effective the approach mentioned in the article was to equalize the power in the two NPNs. My simulation looked so * good* I couild not believe that I had actually altered the bf. Thanks again. Clyde

How may model paramters be read out on an instance basis? I am trying to simulate a circuit where I have altered the beta forward (bf) of a bjt, and would like to know that the change took effect. Here is what I am looking at: https://lnkd.in/p/gQafTfMm Clyde

Thank you. I am simulating a temperature sensor circuit similar to Jim Williams' circuit in Linear Tech application note AN-45. A BJT is used and the circuit requires no calibration.

When the simulator runs at 27 C, is it converted to 300.15 kelvin, or 300 kelvin?

This could be done easily with some XSPICE models, either digital or analog switches.

I once tried to make a timer with a capacitor in the range of the 330 µF, and with the model from the forum, it will simulate, but it is not practical, due to leakage. Clyde On Fri, Dec 12, 2025 at 11:51 AM Dario Martin Lobos dariolobos@users.sourceforge.net wrote: I wil do that. Thanks XSPICE 555 Timer Model https://sourceforge.net/p/ngspice/discussion/ngspice-tips/thread/f535c0f1b9/?limit=25&page=2#baa6 Sent from sourceforge.net because you indicated interest in https://sourceforge.net/p/ngspice/discussion/ngspice-tips/...

I have always deiined my own version of PI to use in .params, PI=4.0*atan(1.0) Thanks for showing the command listing param Giles. This is new to me and helpful.