Regarding simulators (Pspice, TopSpice, SwitcherCad, etc.),
Let us say I have a circuit that will not converge when simulated on an older computer.
==> Is there a chance that, using the exact same simulation program, the same circuit WILL converge on a more powerful computer (i.e. faster, more RAM, etc.)?
Let us say I have a circuit that will not converge when simulated on an older computer.
==> Is there a chance that, using the exact same simulation program, the same circuit WILL converge on a more powerful computer (i.e. faster, more RAM, etc.)?
LtSpice is supposed to be pretty good on convergence - the more recent versions have added a gshunt hack that lets you add a conductance from every node to gnd - sometimes helpful
did you try the ps ramping hack? - replace your supplies with pwl sources that start a 0 - surely it can find an operating point - then ramp the sources to the operating V, this can still get to non-physical states but sometimes works
ideal current sources can run off to KV, volatage sources can supply KA - clamping diodes on ccs to ps helps me occasionally
did you try the ps ramping hack? - replace your supplies with pwl sources that start a 0 - surely it can find an operating point - then ramp the sources to the operating V, this can still get to non-physical states but sometimes works
ideal current sources can run off to KV, volatage sources can supply KA - clamping diodes on ccs to ps helps me occasionally
HFGuy said:Or switch to Cadence, ive yet to have it not converge on me
SwitcherCAD (aka LTSpice) is free. Most of us could not afford the annual maintenance contract, let alone the cost of a license, for Cadence.
I_F
Simetrix always converges for me. You can also change the integration method - fast and loose or slow and accurate. You may also find using a smaller timestep on transient sims will work better. Also setting up your initial conditions better will help. Sometimes adding a small resistor in series with reactive elements (l and C) can help too.
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