Digital Electronics Page: Difference between revisions
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| Line 3: | Line 3: | ||
<table> | <table> | ||
<tr><td>Decimal | <tr><td>Decimal</td><td>BCD</td><td>Gray Code</td></tr> | ||
<tr><td>0</td><td>0000</td><td>0000</td></tr> | <tr><td>0</td><td>0000</td><td>0000</td></tr> | ||
<tr><td>1</td><td>0001</td><td>0001</td></tr> | <tr><td>1</td><td>0001</td><td>0001</td></tr> | ||
| Line 16: | Line 16: | ||
<tr><td>10</td><td>1010</td><td>1111</td></tr> | <tr><td>10</td><td>1010</td><td>1111</td></tr> | ||
</table> | </table> | ||
=Excess-3 Codes= | =Excess-3 Codes= | ||
<table> | <table> | ||
Revision as of 22:51, 14 January 2023
Gray Codes
This is a technique where we convert number from binary to grays. We do this because Gray reduces the bits we need to change to get to the next number. e.g. changing from 2 to 3 decimal requires a 1 bit change.
| Decimal | BCD | Gray Code |
| 0 | 0000 | 0000 |
| 1 | 0001 | 0001 |
| 2 | 0010 | 0011 |
| 3 | 0011 | 0010 |
| 4 | 0100 | 0110 |
| 5 | 0101 | 0111 |
| 6 | 0110 | 0101 |
| 7 | 0111 | 0100 |
| 8 | 1000 | 1100 |
| 9 | 1001 | 1101 |
| 10 | 1010 | 1111 |
Excess-3 Codes
| Decimal | (base 10) | BCD Binary (base 2) | |
| 0 | 0000 | 0011 | |
| 1 | 0001 | 0100 | |
| 2 | 0010 | 0101 | |
| 3 | 0011 | 0110 | |
| 4 | 0100 | 0111 | |
| 5 | 0101 | 1000 | |
| 6 | 0110 | 1001 | |
| 7 | 0111 | 1010 | |
| 8 | 1000 | 1011 | |
| 9 | 1001 | 1100 |