An JK flip flop can be converted to T flip flop by connecting?
A. J to Q
B. K to Q
C. J to K
D. J to Q̅
Please scroll down to see the correct answer and solution guide.
Right Answer is: C
SOLUTION
D flip flop:
D flip flop has only one input terminal. The output of the D flip flop will be the same as the input. Hence, it is used in delay circuits.
The circuit is as shown below.
Logic symbol:
Truth table:
|
D |
Qn (Present state) |
Qn+1 (Next state) |
|
0 |
0 |
0 |
|
0 |
1 |
0 |
|
1 |
0 |
1 |
|
1 |
1 |
1 |
Characteristic equation: Qn+1 = D
The D flip flop may be obtained from an S-R flip flop by just putting one inverter between the S and R as shown in the figure below.
S = R̅
The D flip flop may be obtained from a J-K flip flop by just putting one inverter between the J and K as shown in the figure below.
K = J̅
T flip flop:
T flip flop has only one input terminal. The output of the T flip flop will be toggled when the input is high on every new clock pulse. The output will be the same as the previous state when the input is low.
The circuit is as shown below.
Logic symbol:
Truth table:
|
T |
Qn (Present state) |
Qn+1 (Next state) |
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
1 |
|
1 |
1 |
0 |
Characteristic equation: Qn+1 = TQ̅n + T̅Qn
The T flip flop may be obtained from a J-K flip flop by making both the inputs are the same i.e. J = K.
