I created the boost conveter in LTspice software, but when I try to run the simulation, there was an error message saying:
Fatal Error: In Missing node(s).
Can anyone help me out with the problem?
Electrical – LTspice – “Fatal Error: In Missing node(s)”
boostltspice
Related Solutions
Your circuit would just work as a square wave output if you tried to prototype it, as you are connecting the inverting input to GND and driving the non-inverting input with a couple of volts. In this configuration, you are using the open-loop gain which is very large and it will always saturate the output of the opamp.
I'm not sure if there is a problem in the SPICE model, but I know that trying to go out of the voltage range of the part is causing the simulation to crash.
Try the following circuit and let me know if it runs. It's just a buffer configuration. I also added some offset to the V1 sine wave so that the output will never go negative.
Good luck!
The solver probably doesn't like the open ports SDCOM and SD on U1. If they really are supposed to be open, put a 1e6Ω or 1e9Ω to ground (or whatever value they should be set to). This helps the solver find the value on those ports.
They are probably high impedance to a gate of a mosfet or something like that, if so, its either a floating net or close to it, floating nets are hard to solve for, so you need a current and a voltage so the solver can solve the net.
Best Answer
I suppose you wanted to add a node name (
F4), but you ended up placing a SPICE directive (S). That's why the netlist showsRloadto be connected between the nodesN003and ground, instead of what is seen in the picture,OUT. To correct that, deleteOUT, andIN(same thing), and then add the proper naming: either withF4, or with the small A right between the ground and the resistor, in the toolbar. Or from the menu,Edit > Label Net.Not a big deal, but you renamed the MOSFET's designator from
MtoQ. That's usually reserved to bipolar transistors, though nothing will happen if you rename it, LTspice takes care of it, anyway (see theM§Q1entry in the netlist). Just so you know.