Current Comparator Based Current Divider

The paper describes a current divider (or splitter), i.e., a device that allows the splitting of an alternating current (ac) in two parts in a precise and accurate current ratio. It is based on current comparator techniques so that precise current ratios can be attained with ratio errors bearing parts in 10⁶ to 10⁹. A binary current divider can be made virtually exact (i.e., with unitary current ratio errors of the order of some 10^-9 only), if aided by electronic flux error compensation. Further, coupled transmission lines modeling can assess its current ratio errors over frequency. A current divider finds application in many areas of ac metrology as in highly accurate impedance bridges and current measurements.