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:
Aug. 29, 2006
Filed:
Sep. 20, 2002
Ippei Kanno, Kyotanabe, JP;
Hiroaki Ozeki, Osaka, JP;
Yasuo Oba, Otsu, JP;
Akira Fujishima, Ichinomiya, JP;
Mineyuki Iwaida, Nagaokakyo, JP;
Ippei Kanno, Kyotanabe, JP;
Hiroaki Ozeki, Osaka, JP;
Yasuo Oba, Otsu, JP;
Akira Fujishima, Ichinomiya, JP;
Mineyuki Iwaida, Nagaokakyo, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
Frequency conversion into a first intermediate frequency which is higher than a received frequency band is performed for a received signal by using a mixer and a PLL. Next, an output of the mixer is frequency converted into a second intermediate frequency of a base band by using a quadrature mixer formed by mixers and a phase shifter. At this time, a frequency of the local oscillation signal of a PLL supplied to the quadrature mixer is controlled so as to be switched, depending on a position of the received segment, between a frequency which is higher than the first intermediate frequency and a frequency which is lower than the same.