Digital System

Introduction to the design of combinational systems
Since the invention of the transistor in 1947, digital systems take up an ever-growing part in our lives. Mechanical clocks were replaced with digital ones, the telephony system became digital, information is stored on digital media, digital computers appear everywhere and any car mechanic today will tell you that if you want to fix a modern car, you have to know as much about the car's electronics as you have to know about it's mechanics. The humble silicone microchip has changed every aspect of human life, yet very few people know anything about the "magic" that makes it all possible, in this series of articles I wish to change that. I will talk about the fundamentals of digital design and how digital systems work. The first part of this article deals is an introduction to the first kind of digital systems – combinational systems. The next part will deal with the combinational themselves that will pave us the way to the third part dealing with the more complex sequential systems.