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:
Jan. 03, 2017
Filed:
Aug. 06, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroyuki Yamaguchi, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A printed circuit board (e.g.,) includes capacitor elements (e.g.,and). The capacitor element (e.g.,) returns a common mode current included in a signal output from a signal output terminal (e.g.,) of a semiconductor element (e.g.,), to a ground terminal (e.g.,) of the semiconductor element (e.g.,). The capacitor element (e.g.,) returns a common mode current included in a signal output from a signal output terminal (e.g.,) of the semiconductor element (e.g.,), to the ground terminal (e.g.,) of the semiconductor element (e.g.,). The capacitor elements (e.g.,and) are arranged such that the mutual inductance between a parasitic inductance of the capacitor element (e.g.,) and a parasitic inductance of the capacitor element (e.g.,) for the common mode currents is a negative value. Accordingly, the effective inductances of the first and second capacitor elements for the common mode currents are reduced, which suppresses radiation noise.