Patent ID: 10782323

Abstract:
Various examples are provided for contactless wideband current sensing. A combination of magnetoresistive (MR) sensor and Rogowski coil outputs can be combined to provide current sensing from DC to 10 MHZ or more. In one example, a system includes a MR sensor that can provide an MR output voltage corresponding to a magnitude of the current through a trace; a Rogowski coil sensor that can provide a Rogowski output voltage corresponding to a magnitude of the current; and processing circuitry configured to generate an output current signal by aggregating the MR and Rogowski output voltages. In another example, a method includes conditioning an output from a MR sensor disposed adjacent to a trace carrying a current; conditioning an output from a Rogowski coil disposed adjacent to the trace; and aggregating the first and second conditioned signals to provide an output current signal corresponding to the current passing through the trace.