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Statistical method of measuring the differential linearity of an analog/digital converter using a pseudo-random triangle wave stimulus

机译:使用伪随机三角波激励测量模/数转换器差分线性的统计方法

摘要

The differential linearity of an analog-digital converter is measured by a test method that eliminates the need for precision calibrated test equipment. A triangle waveform with a pseudo random period is applied to the analog/digital converter input. The waveform has a uniform amplitude probability density function. Therefore, any analog/digital converter input voltage has an equal chance of being sampled by the analog/digital converter. The number of times each possible analog/digital converter output code word occurs is counted by a microprocessor. These numbers are a direct measure of differential linearity with an accuracy described by the theory of repeated random sampling.
机译:模数转换器的差分线性度通过一种测试方法进行测量,从而无需精密校准的测试设备。具有伪随机周期的三角波形被施加到模拟/数字转换器输入。波形具有均匀的振幅概率密度函数。因此,任何模拟/数字转换器的输入电压都有被模拟/数字转换器采样的相等机会。每个可能的模拟/数字转换器输出代码字出现的次数由微处理器计算。这些数字是差分线性度的直接度量,其精确度由重复随机采样的理论描述。

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