Serial output circuit, semiconductor device, and serial...

Details Serial output circuit, semiconductor device, and serial... Serial output circuit, semiconductor device, and serial...

2011-08-09

2011-08-09

Cho, James (Department: 2819)

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

C326S119000, C326S027000

Reexamination Certificate

active

07994825

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.

REFERENCES:
patent: 6518792 (2003-02-01), Jong et al.
patent: 7288971 (2007-10-01), Plasterer et al.
patent: 7304504 (2007-12-01), Kang et al.
patent: 7812643 (2010-10-01), Govindu et al.
patent: 2008-227991 (2008-09-01), None

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