##### 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.
Naveen Kumar
28 Sep 2018 09:36 am
Also, Excess-3 binary code is a unweighted self-complementary BCD code.
Ashish Kumar Goyal
28 Sep 2018 01:18 pm
@naveenkr
Pls can u explain unweighted self-complementary BCD code.
Naveen Kumar
28 Sep 2018 02:16 pm
Self-Complementary property means that the 1’s complement of an excess-3 number is the excess-3 code of the 9’s complement of the corresponding decimal number.
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.
Ashish Kumar Goyal
28 Sep 2018 02:30 pm
Thanks @naveenkr for the wonderful explanation.