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:
Apr. 19, 2005
Filed:
Sep. 26, 2002
Applicants:
Hisashi Abo, Tokyo, JP;
Hiroaki Ikeda, Tokyo, JP;
Inventors:
Hisashi Abo, Tokyo, JP;
Hiroaki Ikeda, Tokyo, JP;
Assignee:
Elpida Memory, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H007/38 ; H03H005/00 ;
U.S. Cl.
CPC ...
Abstract
A signal line of a data bus includes first wires on a first board and a second wire on a second board. The second board is installed on the first board to connect the first and second wires with each other in series to establish the signal line. Semiconductor devices are connected with the second wire. In such data bus system, impedance of the second wire is decided according to additional capacitance of the semiconductor device on the second board in order to harmonize impedance of the first board with impedance of the second board.