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Skew-reducing signal line sub-driver circuits, methods and systems
   
Document Number
US Patent 7498853
Issued Date
March 3, 2009
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Abstract
Circuits, methods and systems are provided to reduce skew between a first digital signal that is transmitted by a first driver circuit over a first signal line, and a second digital signal that is transmitted by a second driver circuit over a second signal line. Skew may be reduced by sourcing or sinking additional current to or from the first signal line in response to the first digital signal and the second digital signal transitioning to opposite logical values, and otherwise refraining from sourcing or sinking the additional current to or from the first signal line. Skew may also be reduced between the first digital signal that is transmitted by the first driver circuit over the first signal line and a third digital signal that is transmitted by a third driver circuit over a third signal line by sourcing or sinking additional current to or from the first signal line in response to the first digital signal and the third digital signal transitioning to opposite logical values, and to otherwise refrain from sourcing or sinking the additional current to or from the first signal line.
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Number of Claims:
39
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Published
March 3, 2009
Application Number
11/668,023
Filed
January 29, 2007
US Classification
327/108   327/112 327/170
Int'l Classification
H03K   3/00   (20060101)  
Priority Data
Jul 29, 2006 [KR] 10-2006-0071805
USPTO Field of Search
327/108   327/112   327/170  
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