Decoders

Logic common to both of the previous mux implementations was the decoder function.

Y0

Y1

S

Y0 = S’

Y1 = S

1 to 2 decoder

Y0

Y1

S[1:0]

Y0 = S1’S0’

Y1 = S1’S0

2 to 4 decoder

Y2

Y3

Y2 = S1 S0’

Y3 = S1S0

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