- A combinational circuit consists of logic gates whose outputs at any time are determined by the inputs using logic operations.
- For n input variables, there are 2n possible binary input combinations.
- For each binary combination of the input variables, there is one possible binary value
on each output.
- Hence, a combinational circuit can be described by
1. a truth table that lists the
output values for each combination of the input variables, or
2. m Boolean functions,
one for each output variable.
Combinational Circuit Analysis
- Analysis of a combinational circuit is the determination of the Boolean function that
the circuit implements.
- The analysis starts with a given logic circuit diagram and ends with a set of Boolean
functions or (equivalently) a truth table.
Example:
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