Gray code
Truth table for 3-bit Gray encoder.
in |
in(2) |
in(1) |
in(0) |
out |
out(2) |
out(1) |
out(0) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
2 |
0 |
1 |
0 |
3 |
0 |
1 |
1 |
3 |
0 |
1 |
1 |
2 |
0 |
1 |
0 |
4 |
1 |
0 |
0 |
6 |
1 |
1 |
0 |
5 |
1 |
0 |
1 |
7 |
1 |
1 |
1 |
6 |
1 |
1 |
0 |
5 |
1 |
0 |
1 |
7 |
1 |
1 |
1 |
4 |
1 |
0 |
0 |
3-bit gray encoder implemented with two 4:1 muxes
Truth table for 4-bit Gray encoder
in |
in(3) |
in(2) |
in(1) |
in(0) |
out |
out(3) |
out(2) |
out(1) |
out(0) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
2 |
0 |
0 |
1 |
0 |
3 |
0 |
0 |
1 |
1 |
3 |
0 |
0 |
1 |
1 |
2 |
0 |
0 |
1 |
0 |
4 |
0 |
1 |
0 |
0 |
6 |
0 |
1 |
1 |
0 |
5 |
0 |
1 |
0 |
1 |
7 |
0 |
1 |
1 |
1 |
6 |
0 |
1 |
1 |
0 |
5 |
0 |
1 |
0 |
1 |
7 |
0 |
1 |
1 |
1 |
4 |
0 |
1 |
0 |
0 |
8 |
1 |
0 |
0 |
0 |
c |
1 |
1 |
0 |
0 |
9 |
1 |
0 |
0 |
1 |
d |
1 |
1 |
0 |
1 |
a |
1 |
0 |
1 |
0 |
f |
1 |
1 |
1 |
1 |
b |
1 |
0 |
1 |
1 |
e |
1 |
1 |
1 |
0 |
c |
1 |
1 |
0 |
0 |
a |
1 |
0 |
1 |
0 |
d |
1 |
1 |
0 |
1 |
b |
1 |
0 |
1 |
1 |
e |
1 |
1 |
1 |
0 |
9 |
1 |
0 |
0 |
1 |
f |
1 |
1 |
1 |
1 |
8 |
1 |
0 |
0 |
0 |
4-bit gray encoder implemented with three 4:1 muxes