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31 December 2010Method for reducing harmonic wave voltage
of digital synthetic sine wave
Developing the ac low voltage standard source need the technology of low-noise digital synthesis sine wave. In this
article, we analysed the frequency spectrum characteristic of the digital synthesis sine wave. Considering the ac low
voltage had the strict requirement for harmonic wave, we put forward the "harmonic wave counteraction method", and
found this function to counteract harmonic wave, and made it come true from the mathematics and electrocircuit. By the
strict calculating of the numerical value and testing verification, we testified the feasibility of the method. By using
"harmonic wave counteraction method ", every harmonic wave noise was reduced several order of magnitude, and the
total noise voltage was less than 4μV in the 50Hz~10kHz frequency range, the uncertainty for the effective value of
output voltage was 0.001%.
Bin Wang,Ming Yan,Pan Pan, andWenwu Feng
"Method for reducing harmonic wave voltage
of digital synthetic sine wave", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754459 (31 December 2010); https://doi.org/10.1117/12.885710
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Bin Wang, Ming Yan, Pan Pan, Wenwu Feng, "Method for reducing harmonic wave voltage of digital synthetic sine wave," Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 754459 (31 December 2010); https://doi.org/10.1117/12.885710