It shows signal harmonics is obviously weakened by the smoothing action in the setting process and there is a best conversion frequency to minimize harmonic distortion.
发现了建立过程的平滑作用可以明显地削弱信号的谐波分量，并存在一个最佳转换频率，使谐波失真达到最小值。
Additional negative feedback is provided to set loop gain to unity at the oscillation frequency, to stabilize the frequency of oscillation, and to reduce harmonic distortion.
为了使振荡频率稳定并降低谐波失真，需要加入一个在震荡频率处能够提供单位增益的负反馈路径。
A new method for measuring the total harmonic distortion of ultra low frequency signa1 by means of FFT algorithm is presented and the measuring error is analysed in this paper.
本文提出了采用FFT算法来测量超低频失真度的方法，解决了超低频失真度的测量问题。
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