Minimize the circuit for this expression

[momentum]

Summary: circuit diagram from minimize expression

I am drawing a circuit diagram from a minimize expression. I have come up with two circuit diagrams that give same result.
I am not sure which of the circuit diagram (1) or (2) is correct. Are both my diagram correct? Need help

 

[berkeman]

(thread moved to the schoolwork forums)

I don't understand this in the first circuit. Is it an error?

 

[momentum]

No. This is not error

 

[berkeman]

No. This is not error

So inverting b- gives you back b- ?

 

[momentum]

That is not b- . I crossed out that.

Let me post clean image again.. please see this

 

[berkeman]

Well, they are the same then. The only difference is that you explicitly show how you generate b- in the 2nd case. Are you supposed to assume that you have all terms and inversions, or do you need to make your own inverted terms?

 

[momentum]

The only difference is that you explicitly show how you generate b- in the 2nd case.

did you mean 1st case?

 

[berkeman]

did you mean 1st case?

Oops, you are correct. I meant your first case. In the 2nd case, you seem to have b- available to use as an input without having to make it yourself.