Hi All,
I have been trying to create a Model for a component(Switching Regulator) in which the frequency of switching can be controlled by an external resistor.
I have created a VCO model using a current source and able to vary the frequency of switching also based on the resistor value.
The problem I am facing is My component Model is not able to converge since I have an instability due VCO.
Can somebody give an idea of how to approach here to get a stable component Model.
Thanks
Uthrakumar
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Convergence requires that curves be continuous, and the slope of the curve is continuous (first derivative).
You have to look at where the simulation is not converging... if it's at t=0, (or the bias point calculation), then you might need to set an initial condition (voltage) to a net, thereby selecting a fixed topology of a switching circuit.
If you had an example, or the error from the pspice output file, that would provide more info on where to look...