US 8,264,607 B2 · Method of sampling phase calibration and device thereof

Abstract

A method of sampling phase calibration and a device thereof is suitable for an analog-to-digital converter and phase lock loop (ADC-PLL). The ADC-PLL conducts sampling on a periodic analog signal according to a sampling phase so as to produce a plurality of digital signals. The sampling phase calibration device includes a storage unit, a motion-detecting unit and a control unit. The motion-detecting unit is to calculate the number of motion data corresponding to a sampling phase. The control unit is coupled to the motion-detecting unit for changing the sampling phase so as to obtain the number of motion data corresponding to each sampling phase and selecting the sampling phase corresponding to the minimum number of motion data as an optimal sampling phase. The ADC-PLL can correctly sample an analog signal by using the optimal sampling phase and reduce the influence of clock jitter to the minimum.

Claims10

Dependent claims

A method of sampling phase calibration, suitable for an analog-to-digital converter and phase lock loop, the method comprising:

setting the sampling phase with a first preset phase value;
sampling a periodic analog signal according to the sampling phase to produce a plurality of digital signals, wherein each of the digital signals comprises a plurality of pixel data;
calculating the quantity of cases so as to obtain a number of motion data corresponding to the sampling phase, wherein the case means the difference between the pixel data with same corresponding positions among the digital signals is greater than a first threshold;
changing the sampling phase to obtain the number of motion data corresponding to each sampling phase;
and
selecting the sampling phase corresponding to the minimum number of motion data or one of the sampling phases respectively corresponding to a number of motion data less than a second threshold as an optimal sampling phase.

3 more elements

A sampling phase calibration device, coupled to an analog-to-digital converter and phase lock loop, wherein the analog-to-digital converter and phase lock loop conducts sampling on an analog signal periodically input according to the sampling phase so as to produce a plurality of digital signals, and each digital signal includes a plurality of pixel data;

the sampling phase calibration device comprising:
a storage unit, for receiving and saving the pixel data;
a motion-detecting unit, coupled to the storage unit to calculate the quantity of cases so as to obtain a number of motion data corresponding to the sampling phase, wherein the case means the difference between the pixel data with same corresponding positions among the digital signals is greater than a first threshold;
and
a control unit, coupled to the motion-detecting unit for changing the sampling phase so as to obtain the number of motion data corresponding to each sampling phase and selecting the sampling phase corresponding to the minimum number of motion data or one of the sampling phases respectively corresponding to a number of motion data less than a second threshold as an optimal sampling phase.

2 more elements

Dependencies are inferred from the claim text.

Method of sampling phase calibration and device thereof

Life of this patent

Method of sampling phase calibration and device thereof

Life of this patent

Abstract

Claims10