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. 17, 2012
Filed:
Sep. 15, 2010
Tatsuya Kishii, Iwata, JP;
Hirotoshi Tsuchiya, Fukuroi, JP;
Masayoshi Nakamura, Nagaokakyo, JP;
Masato Miyazaki, Hamamatsu, JP;
Akihisa Himeno, Hamamatsu, JP;
Tatsuya Kishii, Iwata, JP;
Hirotoshi Tsuchiya, Fukuroi, JP;
Masayoshi Nakamura, Nagaokakyo, JP;
Masato Miyazaki, Hamamatsu, JP;
Akihisa Himeno, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
An amplifying device includes a selecting section that selects one of a first power source potential and a second power source potential which are different from each other, a potential generating circuit that generates a third power source potential from the power source potential selected by the selecting section, an amplifier that operates with supply of the first power source potential and the third power source potential, and a controlling circuit that variably controls a target to be selected by the selecting section in accordance with at least one of an amplitude of a signal on an input side of the amplifier, an amplitude of a signal on an output side of the amplifier, and the third power source potential.