Write the truth table for the circuit given in Fig., consisting of NOR gates only. Identify the logic operations (OR, AND, NOT) performed by two circuits.
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For gate shown in Fig. the Boolean expression is `y=barA`, i.e., NOT gate is created. Its truth table is given in Fig. For gate shown in Fig, the Boolean expression is `y=bar(barA+barB)=bar(barA).bar(barB)=A.B` , i.e., AND gate is produced. Its truth table is shown in Fig.
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