Name:
G Number:
PreLaboratory #BCDto7 Segment Decoder
ECE 332
1
Introduction
The topic of Lab 5 is decoders. In this prelab you will design a 4bit BCD to 7Segment Decoder,
simplify the logic and draw the circuit diagram using basic gates. You will be expected to complete
the following items as part of the prelab:
1. Completed Truth Table
2. Completed Karnaugh Maps
3. Simplified logic equations
4. Draw the circuit diagram
Bring the completed prelab to your lab session and hand it in with your lab.
2
Design a 4bit BCD to 7Segment Decoder
The functionality of the 4bit BCD to 7Segment decoder will be similar to that which is described
in your text book. The 4bit BCD to 7Segment decoder has four inputs called
D
0
,
D
1
,
D
2
, and
D
3
. Using these four bit inputs a number between 0 and 15 can be represented. The input
D
3
is
called the most significant bit (MSB) and the input
D
0
is called the least significant bit (LSB).
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 Fall '08
 Staff
 Gate, Binarycoded decimal, Karnaugh map, Gray code

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