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:
May. 11, 2010
Filed:
May. 17, 2006
Yoichi Okubo, Kodaira, JP;
Toshio Nojima, Sapporo, JP;
Yasuhiro Takeda, Kodaira, JP;
Manabu Nakamura, Kodaira, JP;
Masaru Adachi, Kodaira, JP;
Yoichi Okubo, Kodaira, JP;
Toshio Nojima, Sapporo, JP;
Yasuhiro Takeda, Kodaira, JP;
Manabu Nakamura, Kodaira, JP;
Masaru Adachi, Kodaira, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
The performance of an amplifying system is improved by achieving adequate matching. The amplifying system for amplifying signals includes distributing meansthat distribute a signal, a carrier amplifierthat amplifies the distributed first signal in Class AB, a peak amplifierthat amplifies the distributed second signal in Class B or Class C, a first transmission line having a given electric length and being connected to an output of the carrier amplifier, a second transmission line having a given electric length and being connected to an output of the peak amplifier, and a combining endfor combining an output of the first transmission line and an output of the second transmission line. An impedance of the combining end is differentiated from a parallel impedance of load impedances of the carrier amplifier and the peak amplifier at the maximum power converted respectively by the first transmission line and the second transmission line, or is set as a parallel impedance in which the load impedances of the carrier amplifier and the peak amplifier at the maximum power are changed.