Method for incorporating window strobe in a data synchronizer
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United States of America Patent
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Mar 17, 1992
Grant Date -
N/A
app pub date -
May 19, 1989
filing date -
May 19, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and structure for performing data synchronization by delaying the input data for substantially one-half of the VCO signal period and then comparing the phase of the delayed input data to the VCO signal. The phase difference is filtered and controls the frequency of the VCO signal to align the VCO signal with the delayed input data. The delayed input data is clocked into a flip-flop on the opposite phase of the VCO signal to produce an output signal. In a preferred embodiment the delay of the input data for phase comparison, and the delay of the input data for the output flip-flop can be independently selected.
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