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PSPICE-FOR-TI: simulation noise

Part Number: PSPICE-FOR-TI


I wanted to compare simulation results from PSPICE for TI without giving any max. step size and giving a max step size in simulation settings.

but when I see results with max step size provided, It is showing huge noise. please see the below attached images. 

with step size given in simulation settings: 

Step size: 0.001e-6

with default max, step size: means no step size given in simulation settings.

As we can see in the results, if I do not provide any max. step size in settings it is giving me a good wave form. which one should I consider?

Please help me.


Sai Kumar