Phase detection module and phase detection method

A technology of phase detection and phase relationship, which is applied in the direction of electrical components, automatic power control, etc., and can solve problems such as the inability to accurately determine the phase relationship
CN101867369BActive Publication Date: 2012-06-06NAN YA TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NAN YA TECH
Publication Date
2012-06-06

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Abstract

The invention relates to a phase detection module containing a phase detection unit, a plurality of comparators and a judgment unit. The phase detection unit is used for comparing a first input signal and a second input signal so as to generate a phase detection result. The comparators are respectively used for comparing the phase detection result and a plurality of predetermined voltages so as to respectively generate a plurality of comparison results. The judgment unit is used for judging the phase relationship between the first input signal and the second input signal according to the comparison results.
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Description

technical field

[0001] The invention relates to a phase detection module, in particular to a phase detection module which can accurately judge the phase relationship between the two signals when the phase error between the two signals is very small. Background technique

[0002] In many circuits used in signal processing, such as phase locked loop (Phase Locked Loop, PLL), a phase detector is usually included to compare the phase relationship between two signals, and then the comparison result generated by the phase detector is Input to other signal processing units for processing. However, when the phase error between the two signals is very small, the phase detector cannot accurately judge the phase relationship between the two signals due to the influence of noise or jitter on the two signals, thus resulting in subsequent Problems with signal processing. Contents of the invention

[0003] Therefore, one of the objectives of the present invention is to provide a phase ...

Claims

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