Clock extraction device with digital phase lock, requiring no external control
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United States of America Patent
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Aug 7, 2012
Grant Date -
Jun 3, 2010
app pub date -
Apr 4, 2008
filing date -
Apr 6, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for extracting a clock signal from a baseband serial signal, includes an injection-locked oscillator (19), a phase-locked loop (25) including a digital phase detector (26). The oscillator (19) includes a digital input for controlling the value of its natural frequency, and the phase-locked loop (25) includes a counting circuit (30, 35) aggregating the relative values of the digital signal supplied by the digital phase detector (26) and supplying a control signal in digital form for the oscillator (19).
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