5.75. Electronic Signal http://www.ck12.org
Summary
- A message encoded by changing the voltage of an electric current is called an electronic signal. The use of
electric current for this purpose is known as electronics. - Electronic signals may be analog or digital signals. Analog signals consist of continuously changing voltage
in an electric circuit. Digital signals, which are the main type of signals used today, consist of rapid pulses of
voltage that repeatedly switch the current off and on.
Vocabulary
- electronic signal: Use of electric current to encode information.
- electronics: Message encoded by changing the voltage of electric current.
Explore More
Assume you are explaining analog and digital signals to a younger student. Write an original analogy that helps
explain how the two types of signals differ. You can learn more about analogies, including many examples, at the
following URL. http://grammar.about.com/od/topicsuggestions/a/Thirty-Writing-Topics-Analogy.htm
Review
- What is an electronic signal?
- Define electronics.
- Create a table comparing and contrasting analog and digital signals.