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This paper presents a novel die-to-die clock synchronization method that is independent of the inter-die wire delay. Through a 2-Phase All-Digital Delay Locked Loop (2P-DLL) and a Dual Locking Mechanism (DLM), this method can be used to maintain a global clock signal between two dies in a 3-D IC, and thereby enabling the synchronous 3-D IC design(More)
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