Construct a function table showing the outputs for all possi

Construct a function table showing the outputs for all possible combinations inputs. b) How does this circuit\'s operation compare with that of Question 1? c) What does input \'C\' do?

Solution

Since this is an SR flip flop let Q(T) and QN(T) denote output at time T.

a)

b) Question 1 is missing, so cannot compare

c) The input \'C\' enables the circuit. When C is 0, it maintains the circuit in the previous state. When C is 1, is allows the circuit (flip flop) to change state according to inputs S and R

S	C	R		Q(T+1)	QN(T+1)
0	0	0		Q(T)	QN(T)
0	0	1		Q(T)	QN(T)
0	1	0		0	0
0	1	1		0	1
1	0	0		Q(T)	QN(T)
1	0	1		Q(T)	QN(T)
1	1	0		1	0
1	1	1		Invalid	Invalid