Technical Education Department

The Harris-Tech Zone

 

Digital Circuits

A circuit which operates like a switch and can make logical decisions. It is used in computers or similar decision making equipment.

 

Digital circuits are electric circuits based on a number of discrete voltage levels. In most cases there are two voltage levels: one near to zero volts and one at a higher level depending on the supply voltage, which is in use. These two levels are often represented as L and H.

 

Levels

The two levels are used to represent the binary integers or logic levels of 0 and 1. In active-high logic, L represents binary 0 and H represents binary 1.

 

Recent Innovations

Digital circuit technological innovations have benefited from the discovery of superconductivity. Most recently, attempts are being made to construct optical computing systems capable of processing digital information.