Voltage-controlled oscillator with improved tuning curve linearization
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United States of America Patent
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Jun 6, 2017
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app pub date -
Jan 19, 2016
filing date -
Jan 19, 2016
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Abstract
In an embodiment, a voltage-controlled oscillator circuit includes a gain element and an LC resonator coupled with the gain element, the LC resonator including an inductor section and a capacitor section. The capacitor section has at least two branches connected in parallel and a voltage control input for tuning the LC resonator. Any of the at least two branches is selected from the group of DC-coupled and AC-coupled. Characteristics of the two branches and bias voltages of the AC-coupled branches are selected to provide a tuning curve of the voltage-controlled oscillator circuit that is approximately linear.
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