Question

(i) Identify the logic gates marked, P and Q in the given logic circuit.(ii) Write down the output at X for the inputs, A = 0, B = 0 and A = 1, B = 1

Answer 1

if value of A is 0 and B is 0 then for nand gate (and+not) is 1 , and then this value and value of B are in or gate 1+0 is 1 so value of x is 1 and for second A is 1 B is 1 then for nand it is 0 and this value and value of B (1) are in or gate 0+1 then value of x is 1