Title:
個別に整合されたライン・インピーダンスを有するデータ・バス及びライン・インピーダンスの整合方法
Document Type and Number:
Japanese Patent JP4451614
Kind Code:
B2
Abstract:
A data bus for a printed circuit board is disclosed having a plurality of lines separated by a substrate. A method is also disclosed for creating a bus with a reduced reflection of signal energy at the interface between the bus and a receiving agent connected to the bus. The lines in the bus include data lines and at least two strobe lines that are positioned adjacent each other to take advantage of the known impedance inherent to their dominant coupling. The bus includes separate data-line terminations and strobe-line terminations connected to the data lines and strobe lines, respectively. The separate terminations have values matched to impedances calculated from the separate sets of lines to more effectively reduce the reflected energy by more accurately matching the impedances on the lines.
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Inventors:
David Marshall
Karl Jay Voice
Elias Jedham
Karl Jay Voice
Elias Jedham
Application Number:
JP2003150592A
Publication Date:
April 14, 2010
Filing Date:
May 28, 2003
Export Citation:
Assignee:
Hewlett-Packard Development Company
International Classes:
G06F3/00; H05K1/02
Domestic Patent References:
| JP10268993A | ||||
| JP7261890A | ||||
| JP7505734A | ||||
| JP5225113A | ||||
| JP256048A | ||||
| JP471056A | ||||
| JP2001239697A | ||||
| JP3194613A | ||||
| JP566757U |
Attorney, Agent or Firm:
Satoshi Furuya
Takahiko Mizobe
Kiyoharu Nishiyama
Takahiko Mizobe
Kiyoharu Nishiyama