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:
Nov. 25, 2014
Filed:
Mar. 25, 2011
Shinichi Watanabe, Kanagawa, JP;
Shinichi Watanabe, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The disclosed digital amplifier () is provided with a voltage value conversion block () for converting a digital value of a digital pulse width of a digital modulation block () to a voltage value; and an integration circuit block () for generating a triangular wave by way of a master clock and modulating the generated triangular wave on the basis of a signal corresponding to the value of the modulation width of digital pulse width modulation. The disclosed digital amplifier () is provided with a low-pass filter () for demodulating pulse power that has been power-amplified by way of a drive circuit () to analog power of an audio band, and an error amplifier () for computing the voltage difference between the voltage of a low-pass filter () and the low-pass filter () and amplifying thereof.