##### EXCESS-3-CODE | WEIGHTED BINARY CODE

**EXCESS-3-CODE**

** EXCESS-3-CODE**: It is 4 digit code and also called as

**WEIGHTED BINARY CODE.**

- Here, For the Number '+3' is added.

EX: 0010

__0011__

__0101__

Decimal |
Excess Code |

0 |
0011 |

1 |
0100 |

2 |
0101 |

3 |
0110 |

4 |
0111 |

5 |
1000 |

6 |
1001 |

7 |
1010 |

8 |
1011 |

9 |
1100 |

- Here 0000, 0001, 0010, 1101, 1110, 1111 codes are invalid codes.

Pls can u explain unweighted self-complementary BCD code.

e.g, the excess-3 code for 3(0011) is 0110 and to find the excess-3 code of the complement of 3, we just need to find the 1’s complement of 0110 -> 1001, which is also the excess-3 code for the 9’s complement of 3 -> (9-3) = 6.