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:
Jul. 22, 2014
Filed:
Jun. 06, 2012
Hideyo Haruhana, Hamamatsu, JP;
Takayuki Yoshida, Hamamatsu, JP;
Hidekazu Ono, Hamamatsu, JP;
Tatsuya Kishii, Hamamatsu, JP;
Hideyo Haruhana, Hamamatsu, JP;
Takayuki Yoshida, Hamamatsu, JP;
Hidekazu Ono, Hamamatsu, JP;
Tatsuya Kishii, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A power supply control circuit includes a mode controlling unit which, in accordance with an output voltage of an amplifying section, performs a mode up for switching a current power supply voltage of the amplifying section to a higher power supply voltage being higher than the current power supply voltage, and which, in a case where a magnitude of the output voltage of the amplifying section is smaller than a threshold voltage for a predetermined time period or longer, performs a mode down for switching the power supply voltage of the amplifying section to a lower power supply voltage being lower than the current power supply voltage, and a threshold setting unit which sets the threshold voltage based on the output voltage of the amplifying section at a timing when the mode up is performed.