Digital and Analog Systems
Analog Signal Analog signals are time-varying and usually bound to a range (such as +12V to -12V), but have an infinite number of values within that continuous range. Analog signals use the specific properties of the medium to convey signal information. B. Current flowing through the wire. Electrical signals allow you to represent information by varying the voltage, current, or frequency of the signal. Analog signals are often computed as responses to changes in light, sound, temperature, position, pressure, or other physical phenomena. A sequence of discrete values. A digital signal can have only one value from a finite set of possible values at any given time. Analog Signal Digital Signal Variable current or voltage Phase or polarization of electromagnetic fields Sound pressure Magnetization of magnetic storage media Digi...