Method for reducing harmonic wave voltage of digital synthetic sine wave

Bin Wang; Ming Yan; Pan Pan; Wenwu Feng

doi:10.1117/12.885710

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31 December 2010 Method for reducing harmonic wave voltage of digital synthetic sine wave

Bin Wang, Ming Yan, Pan Pan, Wenwu Feng

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Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 754459 (2010) https://doi.org/10.1117/12.885710
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

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%.

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Bin Wang, Ming Yan, Pan Pan, and 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

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