Analog signal
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An analog signal is any continuous signal for which the time-varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. For example, in an analog audio signal, the instantaneous voltage of the signal varies continuously with the pressure of the sound waves. It differs from a digital signal, in which the continuous quantity is a representation of a sequence of discrete values which can only take on one of a finite number of values.
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See also
- Analog computer
- Analog device
- Analog recording
- Analog signal processing
- Analog video
- Analog-to-digital converter
- Digital audio
- Digital signal (electronics)
- Digital video
- Magnetic tape
- Videotape
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