XOR differential phase detector with transconductance circuit as output charge pump
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
Jan 21, 1999
filing date -
Jan 21, 1999
priority date (Note) -
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Abstract
An apparatus for and method of reducing transistor body effect when detecting and correcting a phase error between clock signals using delay-locked and phase-locked loop circuits. The clock signals are provided to an equal number of circuit elements in cross-coupled XOR circuits. The circuit includes a transconductance circuit having at least two PMOS transistors with their substrates directly connected to their sources.
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