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:
Jan. 20, 2009
Filed:
Aug. 15, 2005
Masaaki Noda, Gifu, JP;
Atsuhito Terao, Gifu, JP;
Sanae Asayama, Aichi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A high-frequency receiver and a portable device using the same receiver are proposed for reducing power consumption. Image interference determiner () determines whether or not image interference exists at the present position in a desirable channel to be received, which channel is obtained by a receiving section () or a GPS receiver (). Power supply control circuit () switches mixer () from an image rejection mixer to a double balance mixer when determiner () determines no image interference involves. This mechanism allows mixer () to work as the double balance mixer circuit during the reception of channels free from image interference, so that a mixer consuming less power is achievable. When mixer () works as the image rejection mixer circuit, image interference can be reduced.