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21. 发明授权

US06762626B1 Phase detector 失效
标题翻译：相位检测器
公开(公告)号：US06762626B1
公开(公告)日：2004-07-13
申请号：US10422686
申请日：2003-04-24
申请人： Daniel Mark Dreps , Frank David Ferraiolo , Kevin Charles Gower , Gary Alan Peterson , Robert James Reese
发明人： Daniel Mark Dreps , Frank David Ferraiolo , Kevin Charles Gower , Gary Alan Peterson , Robert James Reese
IPC分类号： H03D900
CPC分类号： H03D13/004
摘要： A phase detector for use in conjunction with a delay locked loop is provided. Programmable delay elements insert an adjustable delay in a received data stream. The programmable delays stress the setup and hold times of the incoming data. Phase detector sampling logic detects the phase difference between a nominal center of the data window, and the limits on the setup (early) edge of the data value window, and the hold time limit (late time) edge of the data valid window (“guardbands”). A data signal arriving earlier than an early guardband or later than a late guardband may not be correctly sampled, and a guardband failure may be said to have occurred. A state machine detects such guardband errors and provides corrective feedback signals.
摘要翻译：提供了一种与延迟锁定环结合使用的相位检测器。可编程延迟元件在接收的数据流中插入可调延迟。可编程延迟会强制输入数据的建立和保持时间。相位检测器采样逻辑检测数据窗口的标称中心与数据值窗口的设置（早期）边沿的限制以及数据有效窗口的保持时间限制（后期）边沿之间的相位差（“ 护卫队“）。在早期保护带之前到达晚于后期保护带的数据信号可能未被正确采样，并且可能说已经发生了保护带故障。状态机检测这种保护带错误并提供校正反馈信号。

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