What is excess-3 code?
Ans. Excess-3 is a complementary BCD code and numeral system uses a pre-specified number N as a biasing value. It is a way to represent values with a balanced number of positive and negative numbers. In excess-3, numbers are represented as decimal digits, and each digit is represented by four bits as the BCD value plus 3.
Excess-3 code is an example of non weighted codes since the position of each bits in excess-3 code does not have weights.