Digital PLL (phase-locked loop) frequency synthesizer
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United States of America Patent
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Mar 19, 2002
Issued Date -
N/A
app pub date -
Mar 5, 2001
filing date -
Sep 3, 1998
priority date (Note) -
Expired
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Abstract
The circuit compensates for phase error in the case of fractional-N-based PLL frequency synthesizers. All required actuating and reference signals are derived from the VCO frequency of the voltage-controlled oscillator by using an auxiliary phase-locked loop. The circuit is specifically applicable for HF-PLL frequency synthesizers using integrated circuit technology.
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