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:
Mar. 17, 2009
Filed:
Apr. 10, 2007
Takuya Masuda, Shizuoka, JP;
Motoyoshi Iwata, Osaka, JP;
Shinichiro Ishihara, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
To provide a high-frequency power amplifier capable of improving the linearity and efficiency of a high-frequency power amplifier by stabilizing, at high frequencies, the bias voltage of a bias circuit featuring the temperature compensating effect of a high-frequency amplifying transistor, a capacitoris connected between the base of a bias supply transistorand a reference potential. It is thus possible to possible to suppress variations in the base voltage of the bias supply transistorin particular when the high-frequency power amplifier is at high output and improve the linearity of the high-frequency power amplifier.