In the sampling technique, this signal is sampled at certain fixed time intervals and the sampled voltage is converted into digital values. However, whenever in any application there arises a need to change an analog signal into a digital one then through sampling this can be achieved. For the purpose of recording the analog signals, the actual signal must be preserved as only in that case we can record the accurate analog signal. The figure below represents an analog signal:Īs we can see here that the signal is continuous in nature as its every value is specified for each particular interval of time, thus, is referred as the continuous-time signal. These are represented as a sinusoidal waveform. More specifically, it is the one defined continuously for a range of values with time. Content: Analog Vs Digital SignalĬomputer data transmission and reception, transmission of signals through cables like telephone.Īnalog signal is continuous in nature as it is well defined for every specific time. So, basically, the type of information carried out by the signal leads to its classification as analog and digital. A quantity that varies in space and time is utilized as a signal in order to transmit the data from one point to another. In electronics and field of signal processing, a signal is defined as an electric current or energy that carries information. Due to the different nature of the two signals, these find applications in different fields.
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