Hiii Eric,Please find the attached simulation filehi hoy,
Please post your LTS asc file.
E
Thank you Still getting the same errorThe current source need a resistive path across the cap to complete the circuit. Try 1e10, for example.
Hi Eric ,hi hoy,
Try this.
E
I don't see why.Still getting the same error
Works for me.
Note that you need to use the UIC transient option to start from 0V.
What version of LTspice are you using?
View attachment 274764
The problem, most likely, is that each node should ideally have a DC path to ground so that the simulator can converge on the initial conditions.I know that when a constant current source is driving a capacitor the output will be a ramp.
I tried to simulate the same in LTSPICE and got this error "ERROR: Node N001 is floating and connected to current source I1".
My circuit is given below.May I know where I went wrong.
View attachment 274754
I performed my experiment of changing the default value of gmin and checking the box that says "Add GMIN across current sources", but the results did not correspond to my hypothesis. So I guess we need a better explanation.Interesting. I ran the post #1 sim with default Gmin of 1e-12, no internal or external resistor. I labelled the top of the cap as node C, added the directive .uic v(c)=0 and got this message in the error log :-
"WARNING: Node C is floating and connected to current source I1. It's .op solution is defined solely by a .ic statement."
So it doesn't look as though Gmin is being used to provide a default current path through the cap.
If all you want to do is see the ramp, add the value IC=0 in the capacitor symbol. That specifies an initial condition for the voltage across the capacitor as "0" volts (so basically, the cap is initially a short circuit to ground).I know that when a constant current source is driving a capacitor the output will be a ramp.
I tried to simulate the same in LTSPICE and got this error "ERROR: Node N001 is floating and connected to current source I1".
My circuit is given below.May I know where I went wrong.
View attachment 274754
by Aaron Carman
by Jake Hertz
by Aaron Carman
by Duane Benson