Introduction
In order to implement a system using digital techniques, such as programmable
processors or digital logic, we first have convert all signals to discrete-time,
using sampling if necessary. This is because any digital implementation must
deal with sequences of signal values.
Sampling does not suffice, however, because digital implementations cannot deal
with samples as real numbers. The samples must be quantized, to represent each
sample by a finite set of values.
Up to Digital and Quantization
