a Suppose a decoder can take five inputs How many output lin

(a) Suppose a decoder can take five inputs. How many output lines will it have?

(b) A multiplexer has n input lines. How many select lines will it have?

Solution

Answer:

b) In general , a multiplexer with 2^n inputs has n select line , but here the questions is in reverse order. Thus if we have n input lines ,the selected lines = logn.

a) A decoder with n inputs and 2^n output , here n =5 , therfore output lines = 2^3 = 32 output lines