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:
Apr. 27, 2004
Filed:
Aug. 11, 1999
Shinji Kakizaki, Kawasaki, JP;
Kunitoshi Yonekura, Kawasaki, JP;
Katsuhiko Kawasaki, Sapporo, JP;
Youji Nakata, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A portable mobile terminal or a transmission unit, applicable to multiplex radiocommunication systems including a CDMA, comprises a modulating section for modulating a transmission signal by using a spectrum spread system, an amplifying section for amplifying the modulated transmission signal to a needed transmission power, a plurality of variable gain units provided between the modulating section and the amplifying section to be connected in series to each other to provide an ability of changing a gain of the transmission signal modulated by the modulating section, and respectively having gain-to-phase characteristics set to cancel a phase variation of the transmission signal to the entire gain variation, and a control section for controlling a gain of each of the variable gain units. The portable mobile terminal and the transmission unit can control the transmission power in multistage throughout a wide range, and can minimize the phase variation of the transmission signal at that time.