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:
Sep. 28, 2010
Filed:
Sep. 10, 2008
Kenji Amada, Kanagawa, JP;
Kenji Amada, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Abstract
A multi-source MOS transistor includes a sense MOS transistor and a load MOS transistor, and is connected to a load. A current detection portion has a negative input offset voltage characteristic, and detects a first sense current in a state where it is connected to the power supply and the sense MOS transistor and a second sense current in a state where it is connected to the sense MOS transistor and the load MOS transistor. A calculation control portion calculates a load current based on the first sense current and the second sense current such that the effect of the input offset voltage in the current detection portion is cancelled.