Common Combinational Logic Circuits

Front

What is a Half Adder?

Back

A simple combinational circuit that adds two single-bit binary numbers. It has two outputs: Sum and Carry.

Front

What is a Full Adder?

Back

Adds three inputs: two bits and a carry from the previous addition. It has two outputs: Sum and Carry.

Front

What is a Half Subtractor?

Back

A combinational circuit that subtracts two single-bit numbers. It has two outputs: Difference and Borrow.

Front

What is a Full Subtractor?

Back

Subtracts three inputs: two bits and a borrow from a previous subtraction. It has two outputs: Difference and Borrow.

Front

What is a Multiplexer (MUX)?

Back

A combinational circuit that selects one of several input signals based on control signals and passes it to the output. A 2-to-1 MUX has two data inputs, one control input, and one output.

Front

What is a Demultiplexer (DEMUX)?

Back

A Demultiplexer takes a single input and routes it to one of several outputs based on control signals. It performs the reverse function of a multiplexer.

Front

What is an Encoder?

Back

An Encoder converts multiple input lines into a smaller number of output lines. For example, a 4-to-2 binary encoder takes four inputs and converts them into two binary outputs.

Front

What is a Decoder?

Back

A Decoder performs the opposite function of an encoder, converting a binary input into multiple output lines. For example, a 2-to-4 decoder has two input lines and four output lines.

Front

What is a Comparator?

Back

A Comparator compares two binary numbers and determines their relationship (e.g., whether they are equal, greater than, or less than each other). It outputs a signal based on the result of the comparison.