Decoders for general-purpose logic

• An n:2n decoder can be used to implement any function of n variables

  • Apply the variables as control inputs
  • OR together the appropriate minterms

Decoder generates the

appropriate minterms

C

A

B

0 A'B'C'1 A'B'C2 A'BC'3 A'BC4 AB'C'5 AB'C6 ABC'7 ABC

S2

3:8

Decoder

S1

S0

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