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:
Jul. 17, 2012
Filed:
Aug. 09, 2011
Fumiaki Senoue, Osaka, JP;
Kouichi Nagano, Osaka, JP;
Fumiaki Senoue, Osaka, JP;
Kouichi Nagano, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An analog complex filter combines an in-phase signal and a quadrature signal to output first and second analog signals. An analog-to-digital converter converts the first and second analog signals into first and second digital signals. A digital complex filter attenuates components corresponding to the quadrature signal and the in-phase signal of the first and second digital signals, respectively. A digital bandwidth limited filter allows a target component and an image component contained in the digital complex signal composed of the first and second digital signals from the digital complex filter to pass therethrough, and attenuates an adjacent interference component. An IQ imbalance correction circuit corrects a quadrature error and an amplitude error between the first and second digital signals from the digital band-pass filter.