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线性是数模转换器的一个重要性能。为了能从数字信号中正确地恢复出模拟信号,总是希望数模转换器有尽可能好的线性。有多种测量线性的方法,本文介绍两种测量方法。 一 阶梯值线性测量法 当N位数模转换器的输入端按顺序输入数字信号时,在模拟输出端将输出一个具有2~N个台阶的阶梯波信号,在这个阶梯波信号中(2~N-1)个阶梯值的均匀性就反映了数模转换器的线性。由于各阶梯不在同一个水平位置上不便于相互比较,同时由于受放大
Linearity is an important property of digital-to-analog converters. In order to correctly recover the analog signal from the digital signal, it is always desirable that the digital-to-analog converter have the best possible linearity. There are several ways to measure linearity, this article describes two methods of measurement. A ladder-valued linear measurement method When the N-bit digital-to-analog converter input digital signals in sequence, the analog output will be output with a 2 ~ N steps of the staircase wave signal in this staircase wave signal (2 ~ The uniformity of N-1 ladder steps reflects the linearity of the DAC. As the ladders are not in the same horizontal position is not easy to compare with each other, while being enlarged