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. 16, 2018
Filed:
May. 29, 2016
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Nobuhide Hachiya, Sapporo, JP;
Takashi Tanii, Sapporo, JP;
Yasuhiro Murakami, Sapporo, JP;
Yusuke Yamamori, Sapporo, JP;
Yasuaki Takeuchi, Sapporo, JP;
Masahiko Hirao, Sapporo, JP;
Manabu Murakami, Kawasaki, JP;
Mikio Hayashihara, Hino, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A power adjustment method includes: measuring output power that is obtained when input power to be amplified in a linear region is input to a power amplifier configured to amplify input power linearly in the linear region and amplify input power nonlinearly in a nonlinear region; deriving a straight line connecting a measurement point corresponding to the measured output power and a boundary point between the linear region and the nonlinear region in a coordinate plane representing input/output characteristics; acquiring information on an approximate equation that is stored in advance in correspondence with the measured output power, the approximate equation representing a relation between input power and output power in the nonlinear region; and storing information on the derived straight line and the acquired information on the approximate equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier.