Example: BCD to Gray code converter
A
D
00 0 0 X 1 01 0 1 X 1 11 0 1 X X 10 0 1 X X
AB
CD
00
01
11
10
C
B
K-map for W
A
D
00 0 1 X 0 01 0 1 X 0 11 0 0 X X 10 0 0 X X
AB
CD
00
01
11
10
C
B
A
D
00 0 1 X 0 01 0 1 X 0 11 1 1 X X 10 1 1 X X
AB
CD
00
01
11
10
C
B
A
D
00 0 0 X 1 01 1 0 X 0 11 0 1 X X 10 1 0 X X
AB
CD
00
01
11
10
C
B
K-map for X
K-map for Y
K-map for Z
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