If the number of n selected input lines is equal to 2^m then it requires _____ select lines.

Combinational Circuits topics include: Multiplexers, demultiplexers, LCD, encoders, parity generators and checkers, combinational circuits, code converters and magnitude comparators. A combinational circuit is a digital logic circuit that produces an output based on the combination of its inputs. Combinational circuits are used for arithmetic and boolean operations.  Here are some features of combinational circuits: Output: The output depends only on the present input. Speed: They are fast. Design: They are easy to design. Feedback: There is no feedback between the input and... Show more

Combinational Circuits topics include: Multiplexers, demultiplexers, LCD, encoders, parity generators and checkers, combinational circuits, code converters and magnitude comparators.

A combinational circuit is a digital logic circuit that produces an output based on the combination of its inputs. Combinational circuits are used for arithmetic and boolean operations. 

Here are some features of combinational circuits:
Output: The output depends only on the present input.
Speed: They are fast.
Design: They are easy to design.
Feedback: There is no feedback between the input and output.
Time: They are time independent.
Building blocks: The elementary building blocks are logic gates.
Memory: They are memory less, meaning the output doesn't depend on past inputs. 

Combinational circuits are made up of logic gates like AND, OR, NOT, and EX-OR. They can have several Boolean inputs and several Boolean outputs. Each output is a Boolean function of the inputs. 

Examples of combinational circuits include: Decoders, Multiplexers, Adders. 
A half adder is a combinational logic circuit that has two inputs and generates a sum and carry as output. 

Related Test: Digital Circuits Practice Test: Arithmetic Circuits

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