The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2005
Filed:
May. 26, 2004
Hironori Tanaka, Tokyo, JP;
Hironori Tanaka, Tokyo, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A source current measurement apparatus for supplying a source voltage to an electronic device and measuring a source current supplied to the electronic device includes a reference voltage generating unit for generating a reference voltage, a supply unit for generating the source voltage based on the reference voltage and supplying the source voltage to the electronic device, wherein the supply unit is provided between the reference voltage generating unit and the electronic device, a feedback unit for controlling magnitude of the reference voltage generated by the reference voltage generating unit based on the source voltage applied to the electronic device, and a measurement unit for measuring the source current, wherein the supply unit includes a first differential amplifier for outputting the source voltage corresponding to a differential between the reference voltage and a predetermined comparison voltage and a second differential amplifier for generating the comparison voltage corresponding to the source voltage outputted by the first differential amplifier and supplying the comparison voltage to the first differential amplifier.