Analog/Digital and Digital/Analog Conversion
Converting between digital and analog signals is key to our ability to use digital computers to process analog data. To complete the loop between the external world and our computer, we need both analog/digital converters (ADCs) and digital/analog converters (DACs). However, a basic understanding of the design principles underlying converters helps us to make the best use of integrated converters. The Nyquist rate criterion tells us the rate at which signals must be sampled to accurately represent them. A wide range of ADC and DAC circuits can be used, each with different design trade-offs. An R-2R digital/analog converter is used as a design example.
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