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. 13, 2010
Filed:
Feb. 23, 2009
Applicant:
Naoki Isoda, Tokyo, JP;
Inventor:
Naoki Isoda, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A DC current reduction circuit of the present invention that reduces a DC component in an output current of a current output element in which an AC current and a DC current are superimposed includes a low-pass filter for extracting a current component of a frequency lower than a cutoff frequency from the output current and a reduction unit that reduces the extracted current component from the output current. The low-pass filter has a frequency changing unit that changes the cutoff frequency from higher to lower as a continuous function over time.