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You are given the two circuits as shown ...

You are given the two circuits as shown in figure. Show that circuit (a) acts as OR gate while the circuit (b) acts as AND gate.

Text Solution

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(a) The output of the NOR gate is given in the input of the NOT gate so its truth table can be written as follows:

From the truth table it can be said that Y = Y.., which shows that the circuit behaves as an OR gate.
(b) Here the output of the two NOT gate is given in the input of the NOR gate so its truth table can be obtained as follows:

From the truth table it can be said that the given circuit acts acts as AND.
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