Digital Systems

What is Digital System?

A digital system is a something that represents information by using digits. Each digit represents a small amount of information because each digit comes from a small set of choices. A digit can be decimal (one of the ten choices from 0 through 9), as in the display of a digital clock. A digit can be binary (either 0 or 1). A binary digit is called a bit. Digital computers and digital communication like the internet usually use binary. The meaning of each bit depends on the place where it is used. For example, a bit can represent ‘Yes’ or ‘No’, or it can represent ‘True’ or ‘False’. A large amount of information, like a picture, can be represented by using a list of many bits.

The term digital system refers to elements such as hardware, software and networks and their use. There may be many different components that make up one system; for example, a computer has a central processing unit, a hard disk, keyboard, mouse, screen etc. A peripheral device is a digital component that can be connected to a digital system, for example, a digital camera or printer.

characteristics of Digital System
  • Data is represented in a digital system as a vector of binary variables.
  • Digital Systems can provide accuracy (dynamic range) limited only by the number of bits used to represent a variable
  • Digital systems are less prone to error than analog systems.
  • Data representation in a digital system is suitable for error detection and correction.
  • Digital systems are designed in a hierarchical manner using re-useable modules.