Some examples: Ring and Johnson counters
D
Q
D
Q
D
Q
D
Q
IN
OUT1
OUT2
OUT3
OUT4
CLK
Ring counter: Sequence is 1000, 0100, 0010, 0001
With one of the patterns as its starting state
Johnson counter: Sequence is 1000, 1100, 1110, 1111, 0111, 0011, 0001, 0000
D
Q
D
Q
D
Q
D
Q
IN
OUT1
OUT2
OUT3
OUT4
CLK
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