PHASE NOISE REDUCTION TECHNIQUES FOR VOLTAGE-CONTROLLED OSCILLATORS (VCOs)
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United States of America Patent
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Issued Date -
Mar 15, 2018
app pub date -
Jun 29, 2017
filing date -
Sep 14, 2016
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Abstract
Certain aspects of the present disclosure provide methods and apparatus for reducing phase noise in voltage-controlled oscillators (VCOs). One example VCO generally includes a first resonant circuit comprising an inductor and a first variable capacitive element coupled in parallel with the inductor; and a second variable capacitive element coupled to a center tap of the inductor and further coupled to a reference voltage, wherein the center tap of the inductor is further coupled to a voltage source.
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