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:
Sep. 23, 2008
Filed:
Oct. 17, 2006
Yoichi Okubo, Tokorozawa, JP;
Yasuhiro Takeda, Kodaira, JP;
Manabu Nakamura, Akishima, JP;
Naoki Hongo, Ome, JP;
Masaru Adachi, Kodaira, JP;
Yoichi Okubo, Tokorozawa, JP;
Yasuhiro Takeda, Kodaira, JP;
Manabu Nakamura, Akishima, JP;
Naoki Hongo, Ome, JP;
Masaru Adachi, Kodaira, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
A first control unit controls a bias applied to the peak amplifier to (a) make a peak amplifier operate as class C when the level of the input signal is lower than a first threshold value, to (b) make the peak amplifier operate as class AB with a second conduction angle substantially equal to a first conduction angle, when the level of the input signal is higher than a second threshold value higher than the first threshold value, and to (c) make the peak amplifier operate as class AB with a third conduction angle smaller than the first conduction angle, when the level of the input signal is not less than the first threshold value and not more than the second threshold value.