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1:4 MUX in VHDL

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  4:1Multiplexer: Multiplexer    is a combinational circuit   which selects   one of the    input   and   passes it    the output   depending   upon   the input   given   to the   selection   line. It   has    one   output   n selection   line and   2 n input line . It    is a multiplexer    I0,I1, I2, I3 are   the four   inputs .s0 and   s1    are   the   selection lines. There is a single   output   y   which    selects   either of   the four inputs.          :   Truth table for4:1 multiplexer