424
Digital Electronics
Q 0
FF0
J
K
1
Clock
Clk
Q 1
FF1
J
K
Clk
Q 0
Q 1
(a)
Q 2
FF2
J
K
Clk
Q 2
Q 3
FF3
J
K
Clk
Q 3
Clock
(b)
Q 0
Q 1
Q 2
Q 3
Figure 11.9 Four-bit synchronous counter.