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

[gag2000]

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 !

 

[gag2000]

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

 

[keith1200rs]

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.

 

[gag2000]

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 ?

 

[keith1200rs]

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

Keith

 

[gag2000]

Bug !
Solved in version 1.00 !