Other Free Encyclopedias » Science Encyclopedia » Science & Philosophy: Ambiguity - Ambiguity to Anticolonialism in Middle East - Ottoman Empire And The Mandate System

Analog Signals and Digital Signals - Analog Signals, Digital Signals, Analog To Digital And Back Again

convey information

A signal is any time-varying physical quantity—voltage, light beam, sound wave, or other—that is used to convey information. Analog signals convey information by analogy (i.e., by mimicking the behavior of some other quantity). Digital signals convey information by assuming a series of distinct states symbolizing numbers (digits). Both analog and digital signals are essential to modern communications and computing, but the greater simplicity and generality of digital signaling has encouraged an increasing reliance on digital devices in recent decades.


User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or