How current probes work when testing DC and low frequencies
The working principle of the current probe when testing high frequency: With the increase of the frequency of the measured current, the Hall effect gradually weakens. When measuring a high-frequency alternating current without a DC component, most of it is directly induced by the strength of the magnetic field. to the coil of the current probe. At this point, the probe is like a current transformer, the current probe directly measures the induced current, not the compensation current, and the output of the power amplifier provides a low-impedance ground return for the coil.