Oscillator, radio communication device, and radio communication method
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United States of America Patent
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Jan 9, 2018
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app pub date -
Jan 18, 2017
filing date -
Jan 22, 2016
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Abstract
An oscillator has an oscillator which comprises a first variable capacitor to adjust capacitance based on a first signal and a second variable capacitor to adjust capacitance, generates an oscillation signal having a frequency in accordance with the capacitance of the first variable capacitor and the second variable capacitor, an integer phase detector to detect an integer phase of the oscillation signal, a fractional phase detector to detect a fractional phase of the oscillation signal, a phase error generator to generate a fourth signal indicating a phase error of the oscillation signal, a first filter to extract the first signal in a predetermined frequency band, included in the fourth signal, and to output the first signal, and a second filter to extract the second signal in a predetermined frequency band, included in the fourth signal, and to output the second signal.
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