In the logic circuit shown in FIGURE 1 switches A and C are

In the logic circuit shown in FIGURE 1, switches A and C are closed and B and D open. Give the required state of the push button switches a, b, c and d in order for the circuit to give a logic \' 1 \' output.

Solution

Ans) For logic \'1\' output inputs to a NOR gate should be all zeors \'0\'s

For all the output\'s of Exclusive OR gate which is input to NOR gate to be zeros whose inputs should not be complement to each other which means no two inputs to EX-OR gate or conpliment to each other as they are

2 input gates their inputs should be same that satisfies they are not compliment to each other

Push button state

a closed (state high \'1\' as A is also closed)

b open (state low \'0\' as B is also open)

c closed (state high \'1\' as C is closed)

d open (state low \'0\' as D is open)