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What is a Encoder ? Draw the Encoder circuit to convert A-F hexadecimal numbers to binary. State an application of a Multiplexer.

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An encoder is a digital function that produces a reverse operation from that a decoder. An encoder has 2n (or less) input limes and n output lines. The output lines generate the binary code for the 2n input variables. 

Hexadecimal No F3 F2 F1 F0
A 1 0 1 0
B 1 0 1 1
C 1 1 0 0
D 1 1 0 1
E 1 1 1 0
F 1 1 1 1

F0 = ∑(B, D, F)

F1 = ∑(A, B, E, F)

F2 = ∑(C, D, E, F)

F3 = ∑(A, B, C, D, E, F)

In telephone network, multiple audio signals are integrated on a single line for transmission with the help of multiplexers.

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