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24 de abr. de 2024 · Analog and digital signals are two fundamental types of electrical signals used to transmit information in various electronic systems. Analog signals are continuous and vary smoothly over time, while digital signals are discrete and represented by a series of discrete values.
Revision notes on 3.3.5 Digital & Analogue Signals for the CIE IGCSE Physics syllabus, written by the Physics experts at Save My Exams.
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2.2 Analog and Digital Signals. Often the domain and the range of a signal f(x) are modeled as continuous. That is, the time (or spatial) coordinate x is allowed to take on arbitrary values (perhaps within some interval) and the value of the signal itself is allowed to take on arbitrary values (again within some interval).
Analogue to Digital Conversion. ADC is a 2 stage process: Regular sampling to convert the continuous time analogue signal into a signal that is discrete in time, i.e., it only exists at multiples of the sample time T. Thus x(t) can be represented as x(0), x(T), x(2T), x(3T)....
Analog signals reproduce real-world data, while digital signals convert this data into binary form. Interference can distort analog signals, making them unclear. Digital signals, however, remain clear despite interference because they only need to distinguish between ones and zeros.
