Phase detection device and method thereof
AssigneeMediatek Inc.
InventorsYuh Cheng, Pi-Hai Liu, Meng-Ta Yang
Life of this patent
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Abstract
A phase detection device comprising an analog-digital converter, an interpolator, and a determining unit. The analog-digital converter receives an analog signal and converts the analog signal to a digital signal according to a plurality of digital sampling points. The interpolator generates a plurality of interpolation points according to a predetermined amount of digital sampling points. The determining unit obtains a phase of the ZC point according to the interpolation points or the digital sampling points.
Claims44
A phase detection device comprising:
- an analog-to-digital converter receiving an analog signal and converting the analog signal to a digital signal according to a plurality of digital sampling points;
- an interpolator for generating a plurality of interpolation points to approach a zero-cross (ZC) point according to a predetermined amount of digital sampling points among the plurality of digital sampling points, wherein the interpolator interpolates an interpolation point between a predetermined amount of boundary points being interpolated at each time, determines the position of the ZC point according to a sign of a value of each interpolation point or a sign of a value of one of the corresponding boundary points and outputs a selection signal, and the predetermined amount of digital sampling points are adjacent to the ZC point;
- and
- a determining unit obtaining a phase of the ZC point to express a phase difference between an interpolation point and one of the digital sampling points.
A phase detection device comprising:
- an analog-to-digital converter receiving an analog signal and converting the analog signal to a digital signal according to a plurality of digital sampling points;
- an interpolator for generating a plurality of interpolation points according to a predetermined amount of digital sampling points among the plurality of digital sampling points, wherein the interpolator interpolates an interpolation point between a predetermined amount of boundary points being interpolated at each time, determines a position of a zero-cross (ZC) point according to a sign of a value of each interpolation point or a sign of a value of one of the corresponding boundary points and outputs a selection signal, and the predetermined amount of digital sampling points are adjacent to the zero-cross (ZC) point;
- and
- a determining unit obtaining a phase of the zero-cross (ZC) point according to the interpolation points or the digital sampling points;
- and
- wherein the interpolation points are generated to approach the zero-cross (ZC) point.
A method for a phase detection device comprising:
- receiving an analog signal;
- converting the analog signal to a digital signal at a sampling clock according to a plurality of digital sampling points;
- generating a plurality of interpolation points to approach a ZC point according to a predetermined amount of digital sampling points among the plurality of digital sampling points;
- and
- obtaining a phase of the ZC point according to the interpolation points or the digital sampling points,
- wherein an interpolation point is generated between a predetermined amount of boundary points being interpolated at each time, the position of the ZC point is determined according to a sign of a value of each interpolation point or a sign of a value of one of the corresponding boundary points and a selection signal is output.
Dependencies are inferred from the claim text.