[SOLVED] Simulation problem of a comparator with spice (gspiceui/ngspice)

Dear all,

I have got a problem with spice simulation.
I have edtited my schematic with gschem, downloaded the .mod spice file from the manufacturer of lmv7219, and set appropriate attribute (file, model, pinorder).
In gspiceui, I import the schematic without problem.
The simulation runs without any problem, the input voltage is OK, BUT the output is stuck to 0V... Same problem with gnucap.

This schematic works : I have simulated the same schematic with Cadence Spectre (at work !) and the output is correct.

I join the spice netlist (with .txt extension due to board restriction), the gspiceui simulation file (again, with .txt) and a jpeg of the schematic for clarity.

Of course, you may request any additional information helping me solving this issue...
Any help or suggestion welcome !

The X1 component is not present in the ckt file generated by gspciui... but why ? It is present in the netlist !

Your image is too small to read.

The netlist simplest.ckt.txt won't do much because you haven't an instance of the subcircuit in your netlist. You have a definition for the LMV7210 but you haven't actually used it (X1 ..... LMV7219 type of line).

netlist.txt will work if you add a .TRAN statement to it but make sure it is for at least as long as the rise time of the pulse waveform.

Keith.

Hi keith,

Thank you, I've just realized that (post #2).
If I add a .TRAN statement and run ngspice by command line, I have the good output.
I have also tried with kjwaves, which give good result.

It seems that ngspiceui skip my component... is it a bug or a missing feature ?

Sorry, I don't use gspiceui/ngspice - I just ran the netlists through SIMetrix.

Keith

Bug !
Solved in version 1.00 !