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:
Aug. 09, 2011
Filed:
Jul. 27, 2010
Yuji Ushio, Ome, JP;
Takashi Muto, Hamura, JP;
Yuji Ushio, Ome, JP;
Takashi Muto, Hamura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In an output circuit having a de-emphasis for use in high-speed serial transmission, a circuit for suppressing a fluctuation of a common mode potential which occurs in output amplitude is provided. A positive pole and a negative pole of an output circuit in a serial transmission device for differential transmission having de-emphasis are connected to the respective outputs of a differential circuit that differentially receives outputs of a detector device for a pattern of data to be transmitted, and a detector device for an inverted pattern of the data to be transmitted. When a specific pattern of data to be transmitted and its reverted pattern appear, a current of the output circuit is compensated by the connected differential circuit, thereby enabling a common mode noise to be prevented.