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Phase detection module and relevant phase detection method

A phase detection and switching technology, which is applied in the automatic control of power, electrical components, etc., can solve problems such as the inability to accurately judge the phase relationship, and achieve the effect of eliminating influence, noise or jitter signals

Active Publication Date: 2010-09-22
NAN YA TECH
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Problems solved by technology

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

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  • Phase detection module and relevant phase detection method
  • Phase detection module and relevant phase detection method
  • Phase detection module and relevant phase detection method

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Embodiment Construction

[0032] Certain terms are used throughout the specification and appended claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This description and the appended claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and appended claims is an open term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0033] figure 2 A phase detectio...

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Abstract

The invention relates to a phase detection module and a relevant phase detection method. The phase detection module comprises a phase detection unit, a comparator and a counter, wherein the phase detection unit is used for comparing a first input signal and a second input signal to generate a phase detection result; the comparator is used for comparing the phase detection result and a preset voltage to generate a comparison result; and the counter is used for counting one of the first input signal and the second input signal to generate a count value. If the count value reaches a preset value, the phase detection result is reset and the count value is also reset; and if the count value does not reach the preset value, the comparison result is output to a target element from the comparator.

Description

technical field [0001] The invention relates to a phase detection module and a related phase detection method, in particular to a phase detection module and a related phase detection method which can avoid the influence of noise. 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. [0003] figure 1 A block diagram of a PLL circuit 100 in the prior art is shown. Such as figure 1 As shown, the PLL circuit 100 generally includes a phase detector 101 , a charge pump 103 , a low-pass filter 105 , a voltage-controlled oscillator 107 , a frequency divider 109 and a frequency divider 111 . The frequency divider 111 is used for frequency dividing an input signal IS (having an input frequency Fin) t...

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Application Information

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IPC IPC(8): H03L7/089
Inventor 郑文昌
Owner NAN YA TECH
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