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:
Feb. 27, 2007
Filed:
Oct. 18, 2004
Applicant:
Toshio Maejima, Iwata, JP;
Inventor:
Toshio Maejima, Iwata, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/38 (2006.01); H03F 3/217 (2006.01);
U.S. Cl.
CPC ...
Abstract
A class-D amplifier for pulse-width-modulating an analog input signal to output a pulse-width-modulated signal, includes: a differentiating circuit for differentiating the pulse-width-modulated signal of the class-D amplifier; and a negative feedback circuit for feeding back the differentiated signal of the differentiating circuit to an input side of the class-D amplifier in a negative feedback manner.