A separately excited three-stage inductive voltage divider (IVD) has been designed for voltages up to 1000 V at frequencies from 50 Hz to 1000 Hz. The IVD provides output to input voltage ratios of 0.001 to 0.01 with in-phase and quadrature uncertainty of the ratio better than 1 /spl times/ 10/sup -6/.
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Small et al. (2005) studied this question.