Mariusz Profecki

Actually I was asking because LTSpice coudln't simulate it :) I think I got it working at last, will be sure after making all simulations I need. Thanks again for all your help!

It seems that simulation runs, but the values are totally wrong, it should be around 300 mV of amplitude at the output of the circuit. I've tested it in the lab :) Is it possible that ngspice can't simulate switching capacitance circuits?

Actually I can only find spinit file. I downloaded the ngspice-31_64.zip file.Also it seems that simulation runs, but the values are totally wrong, it should be around 300 mV of amplitude at the output of the circuit. I've tested it in the lab :) Is it possible that ngspice can't simulate switching capacitance circuits?

Ok I did as you said, but still it says that tc is unknown (it's some parameter in tmux1208) model. And also that rideal is unknown which I suppose is in AD library

ok so if I'm using windows I should put the .spiceinit in the same folder as my circuit and libraries files?

I think that the problem is I know that transitos is in PSpice, the tmux is a model of Tina Ti Spice, and the opamp doesn't say for which simulator was made. Every manufacturer has it's own "favorite" simulator so they give models to their parts in that simulators.... Because of that I'm not sure if changing the .spiceinit as you mentioned would work

thanks a lot! when I changed to V(1)V(1) it simulated something but I got a bunch of errors like "Error on line 3 : v1 n007 0 pulse(0 2 0 1n 1n 5u 10u) rser=50 unknown parameter (rser)" The resistance of voltage source can't be add in ngspice? Also I have " Error on line 0 : c.xu15.c_u15_c3 0 xu15.u15_rc_out 9n tc=0 0 unknown parameter (tc) " (this error occurs around 1000 times actually)

Thanks I got it all working on this small circuit. Could you also help me in finding mine mistake in a "big one"? when I try to simulate it the same way as before I got error: Circuit: * circuit Error: no such function 'pwr' internal error -- segmentation violation The circuit is below: circuit C1 N016 0 4.55n V1 N007 0 PULSE(0 2 0 1n 1n 5u 10u) Rser=50 Vs1 N015 0 SINE(0 0.3 3500) AC 0 Rser=50 C6 N017 0 0.015µ V2 N008 0 PULSE(0 2 5u 1n 1n 5u 10u) Rser=50 C2 N014 0 11.6n C3 N019 0 680p C4 N018 0 41.6n...