gEDA-user: Simple LM741 Op-Amp Example

[Michael B Allen <ioplex@xxxxxxxxx>]

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


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