In an example method for realigning an oscillator that comprises an inductor having first and second terminals, a capacitor electrically coupled in parallel to the inductor at the first and second terminals, and a first transistor of a first conductivity type coupled to the first terminal, a first realignment signal is provided to a gate of the first transistor. The first realignment signal includes a realignment state and a normal state, and a voltage level of the first realignment signal in the normal state is opposite to the voltage level of the first realignment signal in the realignment state. When the first realignment signal is in the realignment state, the first transistor is turned on, and a voltage of the first terminal is increased from a low level to a high level in order to align a phase of a waveform of the oscillator. The first transistor is turned off when the first realignment signal is in the normal state.

The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.