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. 06, 2012
Filed:
Jun. 28, 2010
Applicants:
Yu-chang Pai, Taipei Hsien, TW;
Po-chuan Hsieh, Taipei Hsien, TW;
Chien-hung Liu, Taipei Hsien, TW;
Inventors:
Assignee:
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, New Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 3/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A printed circuit board includes a signal layer and a ground layer adjacent to the signal layer. The signal layer includes a pair of differential transmitting lines. The ground layer includes a common mode filter formed by hollow spiral patterns in the ground layer. The common mode filter includes two filter portions respectively arranged at opposite sides of a projection of the pair of differential transmitting lines onto the ground layer. Hollowed areas of the two filter portions are bridged by a void.