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ra3xdh / qucs_s

Qucs-S is a circuit simulation program with Qt-based GUI
https://ra3xdh.github.io/
GNU General Public License v2.0
868 stars 111 forks source link

DC Block, DC Feed #889

Closed tomhajjar closed 2 months ago

tomhajjar commented 2 months ago

Any reason DC Block, DC Feed are not enabled for ngspice? I have a number of old Qucs projects that use them.

ra3xdh commented 2 months ago

These devices cannot be exactly simulated with SPICE. The DC feed is represented as ideal short circuit for AC, but as inductance for TRAN. The similar is for DC feed. Ngspice cannot determine what simulation is applied and substitute the required model. I can only represent these devices as the static L or C.

tomhajjar commented 2 months ago

Static L/C would work.

The "RF components" menu needs more entries. Maybe C/L Q should be added as well

ra3xdh commented 2 months ago

Fixed by #891