Are there any series capacitors in Ngspice?
I have noticed that ngspice is not able to compile two capacitors which are connected in series. * The global plasma model VRF 0 1 SIN (0 100 0.275732) CBC 2 1 5.25154 Cs 3 2 0.1407107F RB 4 3 5.25154 LB 5 4 212.692 VG 0 5 dc 10 .END
Why does LTspice say that my ” matrix is singular ” for this?
The solution was given by endolith, but if somebody want to have isolated the secondary, he should ground it by a 1Meg or higher resistor, if not, the spice will not able to invert the array to solve the circuit. The problem did not disappear for me so I restarted the LTspice and the problem was gone.
How are voltage sources used in a SPICE circuit?
A current source of positive value forces current to flow out of the N+ node, through the source, and into the N- node. Voltage sources, in addition to being used for circuit excitation, are the ‘ammeters’ for SPICE, that is, zero valued voltage sources may be inserted into the circuit for the purpose of measuring current.
Is the singular matrix reduced to 0.0000%?
Supplies reduced to 0.0000% Warning: singular matrix: check nodes 2 and 2 I would be very grateful, if somebody can give me a Hint on what went wrong. The corresponding figure is given here! the potential of the connection is undefined. but is plain electrotechnics. it might have been charged. Robert is right, of course. across the capacitors).
How to define nonlinear capacitor In LTspice?
In LTSpice, they define nonlinear capacitors using the charge description, so specifying Q = Q (V).
Which is the best operating system for Ngspice?
◮NGSPICE is an open source mixed-signal circuit simulator. It is the result of combining existing SPICE features with some extra analyses, modeling methods and device simulation features. ◮It is freely available for use in Linux and Windows. It is recommended to use Linux for NGSPICE.
Is there a way to plot currents in Ngspice?
In ngspice (which is based on Berkeley Spice 3) you can only plot currents through (independent) voltage sources. These are the only currents that appear in the circuit equations SPICE works from.