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. 17, 2009
Filed:
May. 22, 2008
Applicants:
Hideaki Kondo, Yokohama, JP;
Masaru Sawada, Yokohama, JP;
Norio Murakami, Yokohama, JP;
Syoichi Masui, Kawasaki, JP;
Inventors:
Hideaki Kondo, Yokohama, JP;
Masaru Sawada, Yokohama, JP;
Norio Murakami, Yokohama, JP;
Syoichi Masui, Kawasaki, JP;
Assignee:
Fujitsu Microelectronics Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A filter circuit includes a low-pass filter and a calibration circuit calibrating a frequency characteristic of the low-pass filter. The calibration circuit includes a negative feedback circuit and a control circuit.