Question 14677 – DSSSB PGT 2018 Male
December 24, 2023Question 8882 – ISRO CS 2020
December 24, 2023Question 9232 – GATE 2007
How many 3-to-8 line decoders with an enable input are needed to construct a 6-to-64 line decoder without using any other logic gates?
Correct Answer: C
Question 8 Explanation:
Each 3-to-8 lines decoder has 8 output lines.
So, we can say that
8 lines covered by —– 1 decoder
1 line covered by —– 1/8 decoder
64 lines covered by —– 64/8 = 8 decoders
8 lines covered by —– 8/8 = 1 decoder
Hence total no. of decoder needed is,
8 + 1 = 9 decoders.
So, we can say that
8 lines covered by —– 1 decoder
1 line covered by —– 1/8 decoder
64 lines covered by —– 64/8 = 8 decoders
8 lines covered by —– 8/8 = 1 decoder
Hence total no. of decoder needed is,
8 + 1 = 9 decoders.
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