PLL phase/frequency detector with fully differential output charge pump
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United States of America Patent
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Mar 6, 2007
Grant Date -
Aug 4, 2005
app pub date -
Jan 19, 2005
filing date -
Jan 23, 2004
priority date (Note) -
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Abstract
Charge current in a charge pump of a phase locked loop is equalized by controlling one of the direct current sources with a feedback signal derived from the common mode voltage of a fully differential phase locked loop filter.
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