Frequency multiplier with phase comparator
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United States of America Patent
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-
Aug 30, 2005
Grant Date -
Aug 23, 2001
app pub date -
May 4, 2001
filing date -
Oct 7, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A phase comparison of timing signals is made by combinational circuitry which receives the timing signals and a window signal, the window signal identifying edges of the timing signals to be compared. The comparison may result in a charge pumped output which can be fed back to control the phase of one of the timing signals. The phase comparator and charge pump circuit can be included in a multiplier circuitry in which the phase of an input signal is directly compared to the phase of an edge of the multiplied signal.
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