Data signal timing correction device, filter device, and wireless portable communication terminal
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United States of America Patent
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-
Dec 7, 1999
Grant Date -
N/A
app pub date -
Aug 21, 1997
filing date -
Sep 9, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A data signal timing correcting device has a timing difference detecting circuit that detects a direction and magnitude of a timing shift of a data signal relative to a reference clock signal by calculating a difference between a number of reference signal clock pulses and one symbol of the data signal. A timing correction circuit receives a detection result from the timing difference detecting circuit and provides a trigger signal to a data memory that has stored in it the data signal. A counter loads a value of the difference from the different detecting circuit and, depending upon the magnitude and direction of a detected timing shift, the trigger signal is shifted to an earlier or later timing by one clock pulse of the reference clock signal.
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