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.

This work describes the new approach to the improving of the accuracy of the bridge impedance measurements. By this approach, the bridge balance in a wide impedance range uses the control of the phases of the aggregate of the cardinal signals only. The optimal structure and algorithm of the control of this aggregate of the cardinal signals is determined. Using this approach accurate impedance meters with low size and price are developed. In the limit, this approach gets us the possibility to develop fully integrated impedance meters. Report shortly describes universal impedance meters with phase control, their balance and calibration algorithms.

No abstract

This work describes the new approach to the improving of the accuracy of the bridge impedance measurements. By this approach the bridge balance in wide impedance range uses the control of the phases of the aggregate of the cardinal signals only. The optimal structure and algorithm of the control of this aggregate of the cardinal signals is determined. Using this approach accurate impedance meters with low size and price could be developed. In the limit, this approach gets us possibility to develop fully integrated impedance meters. Report shortly describes universal impedance meters with phase control, their balance and calibration algorithms.