Patent ID: 9442139
Filing Date: 2016-09-13
CPC Classification: G01R

Claim Text:
1. A Rogowski coil assembly useful for measurement of high frequency electrical currents comprising: (a) at least two coil segments disposed in series, wherein each coil segment includes an input and an output; (b) retrospective impedance influence reduction coupling of said at least two coil segments; (c) a signal decoupling circuit having an input and an output; and (d) a non-magnetic core and a return conductor; wherein the at least two coil segments are wound around the non-magnetic core, and the return conductor is led through the non-magnetic core, wherein the at least two coil segments are connected to each other in series through the signal decoupling circuit, with the output of one coil segment connected to the input of the signal decoupling circuit and the input of a subsequence coil segment connected to the output of the signal decoupling circuit, wherein the signal decoupling circuit comprises an impedance converting electrical component with high input impedance and low output impedance, and wherein the impedance converting electrical component comprises an operational amplifier or an electrical difference amplifier with high input impedance and low output impedance.