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提出了一种新的测试非线性谐波失真的算法。运用了数字信号处理技术，可以得到测试非线性器件总谐波失真（ＴＨＤ）的方法。该方法既可提高ＴＨＤ测试的精度，又不需要增加额外的计算量和硬件。
A new algorithm to test nonlinear harmonic distortion is proposed. The use of digital signal processing technology, you can get the total harmonic distortion of non-linear devices (THD) method. This method can improve the precision of THD test, does not need to add extra computation amount and hardware.