Configurable IC's with dual carry chains
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United States of America Patent
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Issued Date -
Oct 18, 2007
app pub date -
Mar 15, 2005
filing date -
Mar 15, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Some embodiments provide a configurable IC that includes several configurable logic circuits, where the logic circuits include several sets of associated configurable logic circuits. For each of several sets of associated configurable logic circuits, the configurable IC includes first and second circuitry for establishing carry signal flow in two directions through the configurable logic circuits. A carry signal flow representing a flow of a carry signal during an add operation performed by a set of associated configurable logic circuits. In some embodiments, the two carry signals flow in opposing directions through the set of logic circuits.
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