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Code Converters and Multiplexers

Q1:

From the following list of input conditions, determine the state of the five output leads on a 74148 octal-to-binary encoder.
I0 = 1 I3 = 1 I6 = 1
I1 = 1 I4 = 0 I7 = 1
I2 = 1 I5 = 1 EI = 0

A GS = L, A0 = L, A1 = L, A2 = H, EO = H

B GS = L, A0 = H, A1 = L, A2 = L, EO = H

C GS = L, A0 = L, A1 = H, A2 = L, EO = H

D GS = L, A0 = H, A1 = H, A2 = L, EO = H

ANS:D - GS = L, A0 = H, A1 = H, A2 = L, EO = H

I guess the answer should be a) as if I4=0 then output in binary is 100, NOTE- inputs of 74148 are low active hence giving a zero to I4 gives binary equivalent of 4 i.e 100, A2=1,A1=0,A0=0.



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