How ADC Works
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چکیده
Consider a sine wave analog signal like the red line in the image below. This particular sine wave has a DC bias of 7.5 Volts and an amplitude of +/7.5 Volts, creating a signal that oscillates between 0 and 15 Volts. An analog-to-digital converter discretizes the analog signal, yielding a digital number that represents the amplitude of the signal. The image below shows how the size wave might be discretized into 16 levels using a 4-bit ADC. Note that the discretization of the signal results in 'steps' being formed when the signal is traced, (an effect usually called aliasing).
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