What is Signal Integrity?

Some of you may have heard the term Signal Integrity (SI) for the first time. A signal is a signal that travels through an electronic device. Electronic devices are made up of 1s and 0s. High and low often represent "1" and "0". With a 3.3 volt (V) supply, high is 3.3 V and low is 0 V.

The speed at which these "1"s and "0s" can be transmitted will improve the performance of the product. As you know, there are tablet devices that you often use, some with slow movement and others with crisp movement. Those that operate fast send and receive signals between multiple LSIs at high speed, and those that operate slowly are slow in this exchange.

As the speed of this exchange increases, the electrical signal begins to have properties similar to light. If you don't design it to communicate well, it will bounce back and you won't be able to convey it well to the other party. This is called signal reflection. Signals may transfer to adjacent signal lines and cause malfunctions. This is called crosstalk.

Designing to minimize this reflection and crosstalk is called signal integrity. If you look up integrity in the dictionary, you'll find translations for perfection or perfection. How to faithfully transmit a signal to the other party may seem simple, but it is actually difficult, but if you understand the principle properly, it is not that difficult.

For freshers, I will explain the contents related to signal integrity in several parts from now on.