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    • 34. 发明公开
    • DLL 회로 및 DLL 회로의 업데이트 제어 장치
    • DLL电路中的DLL电路和更新控制装置
    • KR1020100052664A
    • 2010-05-20
    • KR1020080111478
    • 2008-11-11
    • 에스케이하이닉스 주식회사
    • 장재민김용주한성우송희웅오익수김형수황태진최해랑이지왕박창근
    • G11C8/00G11C7/22
    • H03L7/0814H03L7/085
    • PURPOSE: A DLL circuit and an update control device thereof are provided to efficiently update by utilizing update condition after discriminating the difference of the number of phase comparison sensing result values. CONSTITUTION: A phase sensing part(50) generates a phase sensing signal after comparing and detecting the phase of a reference clock and a feedback clock. An update control device discriminates the difference of the number between a first logical value and a second logical value which a phase sensing signal has in response to the reference clock. The update control device(60) generates a valid interval signal and an update control signal. A shift register(70) updates a delay-value given to a delay line in response to an update control signal when the valid interval signal is enabled. The update control device discriminates the logical value of the phase sensing signal every period of the reference clock.
    • 目的:提供一种DLL电路及其更新控制装置,用于在鉴别相位比较感测结果值的差异之后利用更新条件来有效地更新。 构成:在比较和检测参考时钟的相位和反馈时钟之后,相位感测部分(50)产生相位感测信号。 更新控制装置鉴别相位检测信号响应于参考时钟的第一逻辑值和第二逻辑值之间的数量差。 更新控制装置(60)生成有效间隔信号和更新控制信号。 当有效间隔信号被使能时,移位寄存器(70)响应于更新控制信号更新给予延迟线的延迟值。 更新控制装置在参考时钟的每个周期区分相位感测信号的逻辑值。