A new approach to the creation of the equivalent voltage dividers is proposed. This approach is based on the creation of the signal, having digitally controlled magnitude by the summing of the signals, having digitally controlled phase. On this basis one possible bridge structure has been developed and its properties analyzed.
The accurate (uncertainty -better than 1 ppm, sensitivity -better than 0.1 ppm on main ranges) bridge-comparator, balanced by phase control only, is described. Bridge is aimed to measure any impedance in wide dynamic range (from 10 -7 to 10 17 Ohm). It operates in wide frequency range (from 10 -2 to 10 kHz). Bridge balancing and uncertainty correction use the variational method and measurements of unbalance signals.Bridge compares the impedances with arbitrary phase angle, i.
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