Pillsbury Winthrop Shaw Pittman LLP
Ring-resister controlled DLL with fine delay line and direct skew sensing detector
The present invention related to a ring-resister controlled DLL with fine delay line and a direct skew sensing detector, which is applicable to circuitry for compensating skew between external and internal clocks. The ring-register controlled delay locked loop according to the present invention comprises: a first delay group including a plurality of unit delay elements which are lineally coupled to each other for delaying an input clock signal; a second delay group including a plurality of unit delay elements which are circularly coupled to each other for delaying an output signal from the first delay group; a first control means for determining an amount of lineal delay in the first delay group; and a second control means for determining an amount of circular delay in the first delay group.
Hynix Semiconductor Inc.
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Seong-Hoon Joo-Sun Jun-Hong
Lee Choi Ahn