Patent ID: 6956393
Filing Date: 2005-10-18
Classification: G01R

Abstract:
1. A source current measurement apparatus for supplying a source voltage to an electronic device and measuring a source current supplied to said electronic device, comprising: a reference voltage generating unit for generating a reference voltage; a supply unit for generating said source voltage based on said reference voltage and supplying said source voltage to said electronic device, wherein said supply unit is provided between said reference voltage generating unit and said electronic device; a feedback unit for controlling magnitude of said reference voltage generated by said reference voltage generating unit based on said source voltage applied to said electronic device; and a measurement unit for measuring said source current, wherein said supply unit comprises: a first differential amplifier for outputting said source voltage corresponding to a differential between said reference voltage and a predetermined comparison voltage; and a second differential amplifier for generating said comparison voltage corresponding to said source voltage outputted by said first differential amplifier and supplying said comparison voltage to said first differential amplifier.