1.
Lecture-4
Digital LOGIC DESIGN
UNIT-iii
Code-converters

2.
Code converters
• Digital systems use wide variety of binary codes. Some of these codes
are Binary-Coded-Decimal(BCD), Excess-3, Gray codes etc.
• It is required to convert one code to another.
• Examples of code converters:
– Binary to BCD code converter
– BCD to Binary Code Converter
– BCD to Excess-3 code converter
– Excess-3 to BCD Code Converter
– Binary to Gray Code Converter
– Gray to Binary Code Converter

3.
Binary to BCD Code converter
Truth Table:
K-map Simplification:

4.
Logic Diagram:
SOP form from k-map:

5.
BCD-to-Excess-3 code Converter
Truth
Table:
K-map Simplification:

6.
Logic Diagram:
SOP form from k-map: