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. 02, 2008
Filed:
Jun. 08, 2006
Hideo Ohba, Kanagawa, JP;
Hideo Ohba, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A variable gain amplifier circuit according to an embodiment of the invention includes: an output offset correcting unit for executing correction to attenuate a fixed offset component independent of a gain change of a variable gain amplifier circuit out of a DC offset involved in an output voltage of an amplifying unit; and an input offset correcting unit for executing correction to attenuate an input offset component that varies depending on a gain of an amplifying unit. The correction of the fixed offset component with the output offset correcting unit and the correction of the input offset component with the input offset correcting unit are independently executed.