Patent ID: 7719293
Filing Date: 2010-05-18
Classification: G01R

Abstract:
1. A system for detecting load current across an electronic component, the system comprising: a differential amplifier interfaced with the electronic component and operable to detect voltage drop across the electronic component; a reference current generator interfaced with the electronic component and operable to generate a reference current having a distinguishable characteristic and to apply the reference current to the electronic component by adding the reference current to the load current; a component resistance detector interfaced with the reference current generator and the differential amplifier, the component resistance detector operable to analyze the reference current to determine a voltage drop of the reference current across the electronic component, wherein the component resistance detector comprises first and second filters, the first filter operable to isolate a voltage drop associated with the reference current, the second filter operable to isolate a voltage drop associated with the load current; and a load current detector interfaced with the component resistance detector operable to apply the voltage drop to determine the load current across the electronic component.