发明名称 |
Data bit-to-clock alignment circuit with first bit capture capability |
摘要 |
A circuit for aligning the phase of a parallel data signal to a clock signal. The circuit includes a parallel data terminal for receiving a parallel data signal formed by multiple word bits, a clock terminal for receiving a clock signal, and a data ready terminal for receiving a data ready signal which has a logic state transition aligned with a first information bit of the parallel data signal. A plurality of data signal delay and sampling circuits connected to the clock terminal and the parallel data terminal provide time-slice bit samples of each information bit of the parallel data signal. A comparator and decision circuit coupled to the clock terminal and at least one of the data signal delay and sampling circuits compares and selects one of the plurality of time-slice bit samples which is phase aligned with the clock signal. A multiplexer circuit coupled to each data signal delay and sampling circuit and to the comparator and decision circuit outputs the selected time-slice bit sample of each word bit of the parallel data signal as the phase-aligned parallel data signal. A first-bit intialization circuit connected to the clock terminal and the data ready terminal and coupled to the multiplexer causes the time-slice bit samples corresponding in time to the logic state transition of the data ready signal to be outputted as a first one or more information bits of the phase-aligned data signal before the comparator and decision circuit operates to compare and select one of the plurality of time-slice bit samples.
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申请公布号 |
US6704882(B2) |
申请公布日期 |
2004.03.09 |
申请号 |
US20010766941 |
申请日期 |
2001.01.22 |
申请人 |
MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH |
发明人 |
ZABINSKI PATRICK JOSEPH;DEGERSTROM MICHAEL JOHN;GILBERT BARRY K. |
分类号 |
H04L7/033;(IPC1-7):G06F1/04 |
主分类号 |
H04L7/033 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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