Abstract
Abstract A low-cost open-source wideband current sensor, measuring currents in a frequency range from DC to 5 MHz, is proposed. The sensor provides galvanic isolation, low insertion impedance, and can be used together with an oscilloscope as replacement for an expensive current probe, or as circuit integrated sensor, to measure currents with peak values up to 20 A. The hardware of the sensor consists of standard parts soldered on a printed circuit board; no special custom parts and/or manufacturing steps are needed to build. Applications are general measurement and laboratory use, e.g. measuring current waveforms in lab experiments. But the sensor can also be integrated in control circuits requiring measurements of time varying currents, e.g. for high speed current mode control in power electronics.
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