Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus interface architecture
Reexamination Certificate
2008-05-20
2008-05-20
Knoll, Clifford H (Department: 2111)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus interface architecture
C710S306000, C709S238000
Reexamination Certificate
active
07376778
ABSTRACT:
The present invention provides a digital bus circuit comprising: a bus conductor having two sections each connected to a pass circuit, each bus section being connected to two bus interfaces for respective circuits; at least three of the bus interfaces comprising a tri-state output buffer having a tri-state mode and one or more logic output modes; wherein in a unitary bus mode the tri-state output buffers are arranged such that only one of said output buffers is not in a tri-state mode, and the pass circuit is arranged to substantially couple said bus sections; and wherein in a dual bus mode the tri-state output buffers are arranged such that only one of the output buffers connected to each bus section is not in a tri-state mode, and wherein the pass circuit is arranged to substantially isolate said bus sections.
REFERENCES:
patent: 5870573 (1999-02-01), Johnson
patent: 5936424 (1999-08-01), Young et al.
patent: 6081863 (2000-06-01), Kelly et al.
patent: 6857039 (2005-02-01), Makino
patent: 7145903 (2006-12-01), Gutierrez
patent: 7231531 (2007-06-01), Cupps et al.
patent: 2004/0041902 (2004-03-01), Washington
patent: 2004/0260983 (2004-12-01), Leung et al.
patent: 0 431 688 (1991-06-01), None
patent: 57-187726 (1982-11-01), None
patent: WO 01/73566 (2001-10-01), None
patent: WO 02/063480 (2002-08-01), None
54LS125A/DM54LS125A/DM74LS125A Quad Tri-State Buffers Data Sheet, National Semiconductor, Jun. 1989, pp. 1-2 (http://rabbit.eng.miami.edu/info/datasheets/74LS125.pdf, accessed Aug. 3, 2007).
Dickstein & Shapiro LLP
Knoll Clifford H
Wolfson Microelectronics plc
LandOfFree
Audio device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Audio device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Audio device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2775675