Power gauge for accurate measurement of load current

Abstract

According to one exemplary embodiment, a power gauge for accurately measuring current consumed by a load coupled to a power source includes a current sense resistor having a first terminal coupled to the power source and a second terminal coupled to the load. The power gauge further includes a first integrator configured to integrate a voltage at the first terminal of the current sense resistor during a time period and to output a first integrated voltage. The power gauge further includes a second integrator configured to integrate a voltage at the second terminal of the current sense resistor during the time period and to output a second integrated voltage. A difference between the first and second integrated voltages can be used to accurately determine the current consumed by the load during the time period.

Dependencies are inferred from the claim text.