Compare excess 3 codes and gray code.

Ans.

Excess 3 Codes

1. This is the other form of BCD code. All decimal digits are coded in 4 bit binary code.

2. The code for all decimal digits is obtained by adding decimal 3 to the natural BCD code digit.

3. The code is acquired by adding 3 to the decimal no

4. Self complementing code-helpful in subtraction.

Gray Code

1.  Extremely useful code. Also termed as reflected code.

2.  All gray code is different from the preceding and succeeding codes through a single bit.

3.  Utilized in shaft encoders.