Signals and Systems Page 1
This is the first guide in our Intermediate series of Electronics Fundamentals. Make sure you have read all of our Intro level guides before reading this guide.
Signals and Systems
This is a concept guide. Please do not try to memorize the words that you read in this guide. Try to not get focused on a single paragraph in this guide, but instead try to absorb it as a whole. There is no strict definition for what a system or a signal is.
Signals and Systems is a common term that is used to refer to system design. It is not specific to electronics. You may be reading these guides to learn how to design your own systems, and you may be reading these guides simply to learn how electronics work. In either case, understanding the concepts of signals and systems is an important step in moving on in electronics.
A Simple Example
A simple example of signals and systems is two tin cans with a string stretched between them.
The tin cans and string are a system, and your voice traveling on the string is a signal. Collectively, the whole contraption is a system. However you can break the system down into its individual parts, which are the cans and the string. The tin can in itself is also a system: you can hold it to your ear and tap on the bottom and hear sound out of it. The tin can is converting tapping motion into sound.
The concept of signals and systems is that you can break large, complex systems down into much smaller, easier to understand systems.