Complementary Colpitts voltage controlled oscillator with low power and low phase noise
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United States of America Patent
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Apr 12, 2016
Grant Date -
Aug 27, 2015
app pub date -
Dec 28, 2014
filing date -
Dec 31, 2013
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Abstract
A complementary Colpitts voltage-controlled oscillator having the properties of low power and low phase noise are disclosed. The disclosed complementary Colpitts voltage-controlled oscillator includes: a first circuit composed as a PMOS Colpitts voltage-controlled oscillator having a first PMOS transistor, a first current source, a first capacitor, a second capacitor, and a first inductor but with the first inductor removed; a second circuit composed as an NMOS Colpitts voltage-controlled oscillator having a first NMOS transistor, a second current source, a third capacitor, a fourth capacitor, and a second inductor but with the second inductor removed; and a first transformer and a second transformer arranged between the first circuit and the second circuit.
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