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. 26, 2013
Filed:
Nov. 16, 2009
Applicants:
Osamu Kagaya, Tokyo, JP;
Koyu Takahashi, Yokohama, JP;
Taichi Kogure, Kamakura, JP;
Inventors:
Assignee:
Oclaro Japan, Inc., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
To reduce emission of an unintentional electromagnetic wave even if a frequency of a clock signal being output is high, a printed circuit board () includes: a substrate (); signal output circuits (and) formed on the substrate (), for outputting a clock signal; power supply wirings (and) for connecting the signal output circuits (and) and a power source; and trap filters (and) provided to the power supply wirings (and), for attenuating a frequency component corresponding to a frequency of the clock signal.