What is vlsi?

VLSI is Very Large System Integration

Today, instead of using vacuum tubes (which were used in electronic products a few decades ago), transistors are used. the biggest (but not the only) advantage of the transistors is the size

• instead of having a vacuum tube that id 1-2 cm, a single

transistor is around 40 nm (nano meter) - 25000000 times smaller!!!!

it means that one can create a very complex system, with tens of thousands of transistor, on a single chip that is in the size of 1x1 cm. In other Words, one can integrate many complex modules in his system.

The problem is that when a human being is designing such a complicated system, there are many mistakes because of the system's complexity. Therefore, it takes a very careful process of checks and verifications when designing such a system