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:
Mar. 02, 2010
Filed:
Dec. 20, 2007
Applicant:
Toshio Maejima, Iwata, JP;
Inventor:
Toshio Maejima, Iwata, JP;
Assignee:
Yamaha Corporation, Hamamatsu-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A PWM modulator adds first and second input signals to each other, and performs PWM modulation processing for outputting a PWM-modulated pulse whose pulse width is modulated according to a result of addition. A shift register delays a bit stream acquired from a ΔΣ modulator, thereby generating two bit streams having a time difference which is one-half a period of PWM modulation processing, and the bit streams are supplied at first and second input signals to the PWM modulator.