Flip Flop Sample Assignment
I. D-Flip Flop
A. List of Components and Equipment and DataSheet
1. AND Gate
2. XOR Gate
3. Probe
4. Vcc
5. Ground
6. Clock Pulse
7. D-Flip Flop
8. 7 Segment Display
9. IC 7447N
Figure II‑1: IC 7447 Connection Diagram
Figure II‑2 Electrical Characteristics
Figure II‑3 Internal Circuit
B. Design
S1 > S3 > S6 > S0
Excitation Table for D Flip Flop
|
Qn |
Qn+1 |
Dn |
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
0 |
|
1 |
1 |
1 |
State Table
|
Present State |
Next State | ||||||||
|
Q2 |
Q1 |
Q0 |
Q2 |
Q1 |
Q0 |
D2 |
D1 |
D0 | |
|
S1 |
0 |
0 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
|
S3 |
0 |
1 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
|
S6 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
S0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
K- Map
D2
|
Q0\Q2Q1 |
00 |
01 |
11 |
10 |
|
0 |
0 |
X |
0 |
X |
|
1 |
0 |
1 |
X |
X |
D2= Q2’Q1
D1
|
Q0\Q2Q1 |
00 |
01 |
11 |
10 |
|
0 |
0 |
X |
0 |
X |
|
1 |
1 |
1 |
X |
X |
D1 = Q0
D0
|
Q0\Q2Q1 |
00 |
01 |
11 |
10 |
|
0 |
1 |
X |
0 |
X |
|
1 |
1 |
0 |
X |
X |
D0 = Q1’
Figure II‑4 Circuit Diagram
C. Results:
The given circuit generates a series as specified with each clock pulse.
Figure II‑5 Output 1
Figure II‑6 Output 2
Figure II‑7 Output 3
Figure II‑8 Output 4
D. Constraints:
The speed with which the numbers refresh depends on clock pulse frequency and can be modified only by changing the clock pulse frequency.
E. Discussion and Conclusion:
Synchronous counters run on triggering by clock pulse. Manual intervention or externa input is not required.
The next value coming out of the flip-flop is achieved by changing D value of the flip-flop.
The output matches with the theoretical calculations.
II. JK-Flip Flop
A. List of Components and Equipment and DataSheet
1. AND Gate
2. OR Gate
3. Probe
4. Vcc
5. Ground
6. Clock Pulse
7. JK-Flip Flop
8. 7 Segment Display
9. IC 7447N
Figure III‑1 IC7447 Connection Diagram
Figure III‑2 Electrical Characteristics
Figure III‑3 Logic Diagram
B. Design
S1 > S3 > S8 > S6 > S13 > S10 > S0
Excitation Table for J-K Flip Flop
|
Qn |
Qn+1 |
Jn |
Kn |
|
0 |
0 |
0 |
X |
|
0 |
1 |
1 |
X |
|
1 |
0 |
X |
1 |
|
1 |
1 |
X |
0 |
State Table
|
Present State |
Next State | |||||||||||||||
|
Q3 |
Q2 |
Q1 |
Q0 |
Q3 |
Q2 |
Q1 |
Q0 |
J3 |
K3 |
J2 |
K2 |
J1 |
K1 |
J0 |
K0 | |
|
S1 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
1 |
0 |
X |
0 |
X |
1 |
X |
X |
0 |
|
S3 |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
X |
0 |
X |
X |
1 |
X |
1 |
|
S8 |
1 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
X |
1 |
1 |
X |
1 |
X |
0 |
X |
|
S6 |
0 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
X |
X |
0 |
X |
1 |
1 |
X |
|
S13 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0 |
X |
0 |
X |
1 |
1 |
X |
X |
1 |
|
S10 |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
X |
1 |
0 |
X |
X |
1 |
0 |
X |
|
S0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
X |
0 |
X |
0 |
X |
1 |
X |
K-Map
J3
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
0 |
0 |
1 |
X |
|
01 |
X |
X |
X |
1 |
|
11 |
X |
X |
X |
X |
|
10 |
X |
X |
X |
X |
J3 = Q1
K3
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
X |
X |
X |
X |
|
01 |
X |
X |
X |
X |
|
11 |
X |
0 |
X |
X |
|
10 |
1 |
X |
X |
1 |
K3 = Q2’
J2
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
0 |
0 |
0 |
X |
|
01 |
X |
X |
X |
X |
|
11 |
X |
X |
X |
X |
|
10 |
1 |
X |
X |
0 |
J2= Q3Q1’
K2
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
X |
X |
X |
X |
|
01 |
X |
X |
X |
0 |
|
11 |
X |
1 |
X |
X |
|
10 |
X |
X |
X |
X |
K2 = Q1’
J1
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
0 |
1 |
X |
X |
|
01 |
X |
X |
X |
X |
|
11 |
X |
1 |
X |
X |
|
10 |
1 |
X |
X |
X |
J1 = Q0+Q3
K1
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
X |
X |
1 |
X |
|
01 |
X |
X |
X |
1 |
|
11 |
X |
X |
X |
X |
|
10 |
X |
X |
X |
1 |
K1= 1
J0
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
1 |
X |
X |
X |
|
01 |
X |
X |
X |
1 |
|
11 |
X |
X |
X |
X |
|
10 |
0 |
X |
X |
0 |
J0 = Q3’
K0
|
Q3Q2\Q1Q0 |
00 |
01 |
11 |
10 |
|
00 |
X |
0 |
1 |
X |
|
01 |
X |
X |
X |
X |
|
11 |
X |
1 |
X |
X |
|
10 |
X |
X |
X |
X |
J0= Q2+Q1
Figure III‑4 Circuit Diagram
C. Result
Figure III‑5 Output 1
Figure III‑6 Output 2
Figure III‑7 Output 3
Figure III‑8 Output 4
Figure III‑9 Output 5
Figure III‑10 Output 6
Figure III‑11 Output 7
Figure III‑12 Output 8
D. Constraints:
The speed with which the numbers refresh depends on clock pulse frequency and can be modified only by changing the clock pulse frequency.
For some cases some unwanted text appears because the IC 7447 is not made for values above 9.
E. Discussion and Conclusion:
Synchronous counters run on triggering by clock pulse. Manual intervention or externa input is not required.
The next value coming out of the flip-flop is achieved by changing J and K value of the flip-flop.
The output matches with the theoretical calculations when the numbers range 0-9. But since IC7447 is meant only for BCD values, for two-digit values it does not show correct value. However, we can see that the flip flops work correct and the output is seen in LEDs.
III. References
Dflipflop . (n.d.). Retrieved from hyperphysics: http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/Dflipflop.html
d-flip-flops . (n.d.). Retrieved from circuitdigest: https://circuitdigest.com/electronic-circuits/d-flip-flops
jkflipflop . (n.d.). Retrieved from hyperphysics: http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/jkflipflop.html
sequential . (n.d.). Retrieved from electronics: https://www.electronics-tutorials.ws/sequential/seq_2.html
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