Combinational Logic Circuits

Digital circuits to perform specific functions are available as Integrated Circuits for use. Implementing a Digital system in terms of these dedicated functional units makes the system more economical and reliable. Thus an adder circuit does not have to be implemented by connecting various gates, a standard Adder IC is available that can be readily used. Othercommonly used combinational functional devices are Comparators, Decoders, Encoders, Multiplexers and Demultiplexers.