Multi-decade voltage dividers with phase regulation

D. Surdu
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引用次数: 0

Abstract

Phase controlled accurate voltage divider creates two coherent AC voltages with calculated magnitude ratio using additional voltages with calculated phase control. Ratio of these voltages is calculated theoretically with high accuracy. Digital-to-analog converters (DAC) are used to create AC additional voltages. Because of it the discreteness of the phase controlled voltage divider is equal to DACs digit divided on two. Modern DAC, depend on their operation speed, usually have 6-16 digits. Consequently, the discreteness of the relative magnitude phase control lies in the range of 3 × 10–2 –3 × 10–5. Discreteness of the DAC phase control only slightly infl uence on the accuracy of the magnitude phase control, so that only discreteness of DAC infl uences on the accuracy of measurement by phase controlled dividers. Report describes the methods of the discreteness uncertainty reduction in voltage dividers with phase control. Two methods of the discreteness uncertainty reduction are discussed. First one use phase controlled dividers only. Other one use mixed both phase and magnitude control. The discreteness uncertainty of both methods is investigated. Possibility of the crea tion of the phase controlled divider with diff erent control low are discussed and analyzed. Decade calibration in both cases is developed and researched.
具有相位调节功能的数十年分压器
相位控制的精确分压器使用具有计算的相位控制的附加电压来创建具有计算的幅度比的两个相干AC电压。理论上高精度地计算了这些电压的比率。数模转换器(DAC)用于产生AC附加电压。正因为如此,相控分压器的离散性等于DAC数字除以二。现代DAC,取决于它们的操作速度,通常有6-16位数字。因此,相对幅度相位控制的离散性在3×10-2-3×10-5的范围内。DAC相位控制的离散性对幅度相位控制的精度影响很小,因此只有DAC的离散性影响相位控制分频器的测量精度。报告介绍了用相位控制降低分压器离散不确定度的方法。讨论了离散不确定度的两种降低方法。第一种仅使用相位控制分频器。另一种使用相位和幅度混合控制。研究了两种方法的离散不确定性。讨论和分析了建立不同控制电平的相位控制分频器的可能性。对这两种情况下的十年校准进行了开发和研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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