Topic: The book with examples of circuits, tasks

I search for the book with examples of models (, ) a DB. To be trained. That is at me, it is normal on head the maximum to steam of examples is considered and those is with noticeable simplifications. Or can be eat any resources with variants. Unfortunately, it is necessary to study independently, the teacher with tasks and possibility to check up correctness of the decision at me is not present.
Naturally, in designing there is a considerable share of creativity and different experts can represent the decision on the, but any "problem books" all the same should be somewhere.