Phase detector with linear gain selection
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United States of America Patent
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Sep 10, 2002
Grant Date -
N/A
app pub date -
Sep 12, 2000
filing date -
Sep 12, 2000
priority date (Note) -
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Abstract
A phase detector with a linear gain characteristic includes two exclusive-OR gates with inputs connected to an input signal and an inverted input signal and a reference signal in a phase locked loop. The outputs of the exclusive-OR gates are connected to a plurality of switches. The switches are connected to a plurality of resistors and the resistors are connected together to form an output signal. Switches and resistors are selected in complementary pairs by a gain select function to provide a linear gain characteristic for the output signal.
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