Multiple phase voltage controlled oscillator including a resonant circuit and negative resistance circuit
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United States of America Patent
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May 7, 2013
Grant Date -
Jun 23, 2011
app pub date -
Dec 2, 2010
filing date -
Dec 21, 2009
priority date (Note) -
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Abstract
A voltage controlled oscillator includes a resonant circuit including one or more transformers and a plurality of variable capacitor circuits connected in parallel to the one or more transformers and generating a plurality of oscillation signals having multiple phases, and a negative resistance circuit including a plurality of transistors cross-coupled via the one or more transformers and generating negative resistance for maintaining the oscillation of the resonant circuit.
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