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GR0877 Problem 48

PROBLEM STATEMENT: This problem is still being typed.

SOLUTION: (C) We have one NOR-gate with two inverted inputs, one AND-gate and one NAND-gate (you should remember this from your electrical engineering course to solve this problem). For NOR-gate with inverted inputs the output is \overline{\overline{A} + \overline{B}}, for NAND-gate \overline{C \cdot D}. Thus, E = \overline{\overline{A} + \overline{B}} \cdot  \overline{C \cdot D}.

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Categories: 0877 Tags: , , , ,
  1. d
    30.03.2014 at 19:12

    I’m not sure if all logic gate questions will be like this. Without knowing logic gates, I noticed that since all pairs of letters (AB and CD) had bars over them, this must correspond to the open circles.

    Since A and B both connect to open circles, we can choose between C or E. Since the shape of the AB thing is different from the shape of the CD and E things, it must have a different operation than the two, which leaves C as an option.

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