The waveform of the letter ‘O’ can be obtained by generating three signals acting as masks and applying a logic function on them.
Figure 1. Waveform for the Letter ‘O’
The truth table of the operation is shown in the table below:
| M3 | M4 | M5 | O |
|---|---|---|---|
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |