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What are ways one can measure current?

Field-effect transistor

Multicore cable

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Current can be measured using various methods. One approach involves utilizing a device with magnetic field sensor elements positioned along closed paths encircling a current-carrying conductor, where each sensor element detects a specific vector component of the magnetic field generated by the current . Another method employs a current measurement device with low and high-frequency measurement sensors, a negative feedback circuit, a low-pass filter, and an output unit to measure the current with a wide frequency range . Additionally, a current measurement device can consist of sensors detecting DC and AC magnetic fields, calculation units using distance information to determine current, and a combination unit to merge calculation results for accurate measurements . Furthermore, a current measurement apparatus may include an annular ferromagnetic core with magnetic field sensors, an analog-to-digital converter, and a current calculation component to determine the current in a multicore cable .

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Patent Device for measuring electric current Disselnkoetter Rolf, Ottoboni Roberto, Toscani Sergio - Show less +2 more 23 Sep 2019 1 Citations	The device in the paper measures electric current using magnetic field sensor elements along closed paths encircling a conductor, each with unique sensitivities and amplified output signals for accurate measurement.
Patent Current measurement device, current measurement method, and non-transitory computer readable storage medium Takenaka Kazuma, Ogawa Kotaro, Terao Minako, Noguchi Naoki, Kobako Saki, Terao Fumitake, Yoshitake Satoshi - Show less +6 more 24 Dec 2020	Current can be measured using a device with sensors detecting DC and AC magnetic fields generated by current in a conductor, calculating current based on sensor data and distance information.
Patent Current measurement apparatus Lampe Mattias, Bovensiepen Daniel - Show less +1 more 04 Jun 2020	One way to measure current is using a current measurement apparatus with an annular ferromagnetic core, magnetic field sensors, analog-to-digital converter, and current calculation component as described in the paper.
Patent Method and device for measuring current Michael Finkenzeller, Martin Schulz - Show less +1 more 22 Dec 2015 2 Citations	The paper discusses measuring current using a field effect transistor with a maximum blocking voltage of 100 V, nodes for integration, means for measuring voltage, and a control means.
Patent Apparatus for measuring current Takenaka Kazuma 10 May 2018	The paper introduces an apparatus for measuring current using low and high frequency sensors, negative feedback circuit, and a low-pass filter to output the measured current value accurately.

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