Hi, I'm just paying around but I'm trying to do a simple LM741 Op-Amp simulation. Here is my schematic:
http://207.192.69.113/~miallen/lm741.pdf I pieced this together from a notebook I got from Radio Shack. When I try a 5ms Transient simulation at 440 Hz in GSpiceUI I get: #Time V(input) did not converge 0. -1.2463E+6 very backward time step convergence failure, reducing (itl4) newtime=7.629395e-13 rejectedtime=1.525879e-12 oldtime=0.000000e+00 using=1.000000e-12 tried everything, still doesn't work, giving up If I blindly mess with resistor values I can get the simulation to actually complete but the input node isn't giving me a good SIN. Is my voltage divider wrong? How do I get -4.5 and +4.5 to Vss and Vcc respectively? Mike _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
