公开(公告)号：US20190212373A1

公开(公告)日：2019-07-11

申请号：US16326240

申请日：2016-10-21

Applicant: SONY MOBILE COMMUNICATIONS INC.

Inventor： Gunnar KLINGHULT ,  Björn ROSQVIST ,  Kåre AGARDH

IPC: G01R19/25 ,  G01R15/18 ,  G01R1/20

Abstract: The disclosure relates to a device for measuring electrical current in an electrical conductor (2), the device comprising: a measuring circuit configured to be connected to the electrical conductor, the measuring circuit comprising: a resistor based measuring circuit comprising a resistor (10), a transformer based measuring circuit comprising a current transformer (20) comprising a primary coil (20a), connected in series with the resistor (10) of the resistor based measuring circuit, a first inverter (12) configured to transform a first digital signal using a transfer function being an inverse of a transfer function representing the resistor based measuring circuit; a second inverter (22) configured to transform a second digital signal using a transfer function being an inverse of a transfer function representing the transformer based measuring circuits; and a signal combiner (5) configured to combine the transformed first and second digital signals, thereby providing a digital signal representing the electrical current in the electrical conductor. The disclosure also relates to a method for measuring electrical current in an electrical conductor.