Block diagram design Example
Jun 27, 2015
Block diagram design
Example
• You can force the inputs a, b, c, and d then vary the inputs of s0 and s1 and observe the output .
• Also you can use the new design as a module to design 8:1 MUX and so on …
• Also you can construct any combinational logic
Counter Design Using JK FF
Qn+1 K J
Qn 0 0
1 0 1
0 1 0
Qn 1 1
3 BIT Counter Using 3 JK FF
• If we set Jk = 11 the Output will toggle with Clk rising edge and the truth table of the output will be as the counter output
C B A
0 0 0
1 0 0
0 1 0
1 1 0
0 0 1
1 0 1
0 1 1
1 1 1
C B A
1 1 1
0 1 1
1 0 1
0 0 1
1 1 0
0 1 0
1 0 0
0 0 0
If the outputs are taken from Q If the outputs are taken from Qbar
Up Counter Operation Down Counter Operation