基本定义在幅值上及时间上模拟信号是连续的,而数字信号则是不连续的。图1说明了一个模数变换器(ADC)怎样把一个连续的模拟信号转换为用二进制编码表示的不连续值。用一个二进制数来表示一定范围内的模拟值,其度量单位是量化带宽(quantigationband),其度量转换点被称为编码中心 The basic definition of the analog signal in amplitude and time is continuous, while the digital signal is not continuous. Figure 1 illustrates how an analog-to-digital converter (ADC) converts a continuous analog signal into discrete values ​​expressed in binary code. A binary number is used to represent a range of analog values ​​whose unit of measure is the quantigation band whose metric transition point is called the code center