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. 01, 2014
Filed:
Jan. 05, 2011
Rintaro Sukegawa, Kanagawa, JP;
Seigo Ozaki, Kanagawa, JP;
Rintaro Sukegawa, Kanagawa, JP;
Seigo Ozaki, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A supply voltage controllerincludes a simplified envelope creating unitthat calculates an envelope of an input audio signal according to an input audio signal from an external device, creates a supply voltage control signal so that a waveform of the supply voltage control signal follows a waveform of the envelope, and outputs the supply voltage control signal to a voltage variable power supplya constant time before the input audio signal is amplified by the amplifier. Accordingly, an amplifying device can be provided which can reduce the distortion of the output signal not depending on a change in the slew rate of the voltage variable power supplyand suppress the deterioration of power efficiency.