Category: 7. Combinational Logic

The Binary Subtractor is another type of combinational arithmetic circuit that produces an output which is the subtraction of two binary numbers. As their name implies, a Binary Subtractor is a decision making circuit that subtracts two binary numbers from each other, for example, X – Y to find the resulting difference between the two numbers. Unlike the Binary Adder which…

The Digital Comparator is another very useful combinational logic circuit used to compare the value of two binary digits. The binary or digital comparator can be constructed using standard AND, NOR and NOT gates to compare the digital signals present at their input terminals and produce an output depending upon the condition of those inputs. For example, along with being…

Binary Adders are arithmetic circuits in the form of half-adders and full-addersb used to add together two binary digits. Another common and very useful combinational logic circuit which can be constructed using just a few basic logic gates allowing it to add together two or more binary numbers is the Binary Adder. A basic Binary Adder…

A Display Decoder is a combinational circuit which decodes and n-bit input value into a number of output lines to drive a display. A Digital Decoder IC, is a device which converts one digital format into another and one of the most commonly used devices for doing this is called the Binary Coded Decimal (BCD) to 7-Segment…

Binary Decoder is another combinational logic circuit constructed from individual logic gates and is the exact opposite to that of an Encoder. The term “Decoder” means to translate or decode coded information from one format into another, so a binary decoder transforms “n” binary input signals into an equivalent code using 2n outputs. Binary Decoders are another…

Priority Encoders take all of their data inputs one at a time and converts them into an equivalent binary code at its output. Unlike a multiplexer that selects one individual data input line and then sends that data to a single output line or switch. The job of a priority encoder is to produce a…

The demultiplexer is a combinational logic circuit designed to switch one common input line to one of several seperate output line. The data distributor, known more commonly as the demultiplexer or “Demux” for short, is the exact opposite of the Multiplexer we saw in the previous tutorial. The demultiplexer takes one single input data line and then…

The multiplexer is a combinational logic circuit designed to switch one of several input lines to a single common output line Multiplexing is the generic term used to describe the operation of sending one or more analogue or digital signals over a common transmission line at different times or speeds and as such, the device…

Combinational Logic Circuits are memoryless digital logic circuits whose output at any instant in time depends only on the combination of its inputs. Unlike Sequential Logic Circuits whose outputs are dependant on both their present inputs and their previous output state giving them some form of Memory. The outputs of Combinational Logic Circuits are only determined by the…