Device and method for adaptive loop gain of oscillator
AssigneeSamsung Electronics Co., Ltd.
InventorsDokyung Lim, Junhyeok Yang, Chanyoung Jeong
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Abstract
A device includes an oscillator including at least one inductor and at least one capacitor and configured to generate, based on a positive supply voltage, an output signal oscillating in a resonance frequency of the at least one inductor and the at least one capacitor. The device further includes an oscillation detector configured to determine whether the output signal oscillates based on a clock signal and increase a loop gain of the oscillator until the output signal oscillates.
Claims19
A device, comprising:
- an oscillator including at least one inductor and at least one capacitor, the oscillator configured to generate, based on a positive supply voltage, an output signal oscillating in a resonance frequency of the at least one inductor and the at least one capacitor;
- and
- an oscillation detector configured to detect a frequency of the output signal according to a clock signal and determine, based on the detected frequency of the output signal, whether the output signal oscillates and increase a loop gain of the oscillator until the output signal oscillates.
A method of controlling an oscillator, the oscillator including at least one inductor and at least one capacitor, the method comprising:
- receiving an output signal oscillating in a resonance frequency of the at least one inductor and the at least one capacitor, the output signal being generated by the oscillator based on a positive supply voltage;
- detecting a frequency of the output signal according to a clock signal and determining, based on the detected frequency of the output signal, whether the output signal oscillates;
- and
- increasing a loop gain of the oscillator until the output signal oscillates.
A device, comprising:
- a phase detector configured to detect a phase difference between a clock signal and a feedback signal;
- a voltage generator configured to generate an input voltage based on the phase difference;
- an oscillator configured to generate an output signal with a frequency that is adjusted according to the input voltage;
- a frequency divider configured to generate the feedback signal based on dividing the output signal;
- and
- a controller configured to determine whether the output signal oscillates and increase a loop gain of the oscillator until the output signal oscillates,
- wherein the controller is configured to detect the frequency of the output signal according to the clock signal and determine, based on the detected frequency of the output signal, whether the output signal oscillates.
Dependencies are inferred from the claim text.