SOS: can i find some PSPICE examples for learning

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Hi, I am a fresh fish on learning ORCAD.
and i finish reading one book and did some examples in the book.
and now I would like to learn more about PSPICE by examples.
like matlab, it has a lot of demo examples in toolbox..., do not know
whether PSPICE have similar function.... or can i find some example
database through web...
thanks...