Phase detector for all-digital phase locked and delay locked loops
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United States of America Patent
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Oct 17, 2006
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N/A
app pub date -
Aug 10, 2005
filing date -
Aug 31, 2000
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Abstract
A phase detector is comprised of two cross-coupled gates which are capable of phase discrimination down to a level of approximately 10 picoseconds. An arbiter circuit, responsive to the cross-coupled gates, generates mutually exclusive UP and DOWN pulse signals. The UP and DOWN pulse signals may be filtered and used to control the delay line of an all digital delay locked or phase locked loop.
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