1.

Sketch the output y from a NOR gate having input A and B as given in Fig.

Answer» For NOR gate the Boolean expression is
`bar(A+B)=y`
For the given wave form, we have the following value for A, B and y.
For time `t lt t_(1), A=1, B=1` hencey `=0`
For time `t_(1) "to" t_(2), A=0, B=0` hencey `=1`
For time `t_(2) "to" t_(3), A=0, B=1` hencey `=0`
For time `t_(3) "to" t_(4), A=1, B=0` hencey `=0`
For time `t_(4) "to" t_(5), A=1, B=1` hencey `=0`
For time `t_(5) "to" t_(6), A=0, B=0` hencey `=1`
For time `t gt t_(6), A=0, B=1` hencey `=0`
The wave from for output y is as shown in Fig.


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