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ADC and DAC

资料介绍
Most of the signals directly encountered in science and engineering are continuous: light intensity
that changes with distance; voltage that varies over time; a chemical reaction rate that depends
on temperature, etc. Analog-to-Digital Conversion (ADC) and Digital-to-Analog Conversion
(DAC) are the processes that allow digital computers to interact with these everyday signals.
Digital information is different from its continuous counterpart in two important respects: it is
sampled, and it is quantized. Both of these restrict how much information a digital signal can
contain. This chapter is about information management: understanding what information you
need to retain, and what information you can afford to lose. In turn, this dictates the selection
of the sampling frequency, number of bits, and type of analog filtering needed for converting
between the analog and digital realms.
CHAPTER
ADC and DAC
3

Most of the signals directly encountered in science and engineering are continuous: light intensity
that changes with distance; voltage that varies over time; a chemical reaction rate that depends
on temperature, etc. Analog-to-Digital Conversion (ADC) and Digital-to-Analog Conversion
(DAC) are the processes that allow digital computers to interact with these everyday signals.
Digital information is different from its continuous counterpart in two important respects: it is
sampled, and it is quantized . Both of these restrict how much information a digital signal can
contain. This chapter is about information management: understanding what information you
need to retain, and what information you can afford to lose. In
ADC and DAC
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