A decoder is a special type of circuit termed a control circuit
that is used to route data on a computer. This circuit has N inputs
and 2N outputs. The N input values are interpreted as a
single (unsigned) binary number representing a value between 0 and
2N-1. The decoder's job is to determine the value
represented on its N input lines and then to send a 1 to one output
line corresponding to this value. For example a 2-4 decoder circuit
has 2 input lines and 4 output lines. If the input values are 00,
then the first output line will have a value of 1, and the other
output lines will have a value of 0. If the input values are 01,
then the second output line will have a value of 1, and the other
output lines will have a value of 0, etc.
Build a 3-8 decoder that has 3 input lines and 8 output lines. You
should provide the full truth-table, the sub-expressions, the final
Boolean expression, and draw the circuit.
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