Voltage-controlled oscillator decreasing phase noise
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United States of America Patent
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May 19, 2009
Grant Date -
Jul 24, 2008
app pub date -
Aug 8, 2007
filing date -
Jan 19, 2007
priority date (Note) -
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Abstract
A voltage-controlled oscillator includes an LC bank, a negative resistor circuit, a DC block, an AC block including a source resistor, and a first bias circuit controlled by a junction node of a first and second transistor, wherein the first bias circuit provides a first feedback voltage to a first control node, and maintains a voltage at the junction node of the first and second transistors, and a second bias circuit controlled by the junction node, wherein the second bias circuit provides a second feedback voltage to a second control node and maintains a voltage at the junction node.
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