. What is Weighted Code?
A weighted code is a code in which a weight has been assigned to each symbol position in the code word. Weighted codes are commonly used for representing numbers.
Example: BCD, 7421 codes, 5211 code.
. What is Non-Weighted Code?
Non-weighted codes are defining as codes in which there are no specific weights assign to their bit positions. Gray code is an un-weighted code.
. What is Gray Code?
Y It is a non-weighted code.
Y In this code a decimal number represented in binary form in such a way that each gray code number differs from the preceding and succeeding number by a single bit.
Y This code is a reflected code.
Y Used: A/D converter, I/O device etc.
. What is Excess-3 Code?
This non-weighted code is another form of BCD code. Excess-3 code is derived by adding 3 to each decimal digit and then converting the result of four-bit binary. It is a self-complementary code.
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