开云体育

I'm trying to simulate a transformer-like situation using two coupled inductors. In SPICE this is done with a 'K' statement indicating the two inductors to be coupled amongst other things.
My question is pretty simple but I'm stuck. How can I add this 'K' directive to the ngspice netlist? I can see the netlist in the Simulation workbook window (Simulation | Show Spice Netlist...) but while you can edit it it doesn't seem to be saveable.
I've seen some suggestions about modifying the schematic file (which is text), but does anyone know the 'proper' way to do this?
Thanks.