Circuit and method for generating clock pulse data reply signal phase locked index

Abstract

The present invention discloses a circuit and a method for generating a clock pulse data reply signal phase locked index. The circuit includes an oversampling logic unit, an alternating current estimator, and a logic processor. The oversampling logic unit generates a plurality of alternating current terms according to an oversampling clock pulse, and outputs a plurality of alternating current terms corresponding to an output clock pulse from the plurality of alternating current terms according to the output clock pulse. The alternating current estimator executes a discrete cosine transform and a discrete sine transform on a plurality of alternating current terms output from the oversampling logic unit within a first predetermined time to generate a first value and a second value respectively. The logic processor compares a number of first values and a number of second values within a second predetermined time, and generates a clock pulse data reply signal phase locked index according to a comparing result.

Description

technical field [0001] The present invention relates to a circuit and method for generating clock pulse data reply signal phase lock indicator, especially a kind of multiple exchange items generated after performing oversampling on data of a channel to generate clock pulse data reply Circuit and method for signal phase locking indicator. Background technique [0002] In the prior art, the phase lock loop lock indicator can be used to generate the lock indicator of the clock pulse data recovery device based on the phase locked loop; the known bit pattern can be transmitted and checked The error rate of the returned bit is used to generate the phase lock index of the clock pulse data recovery signal; the known reference clock pulse can be used to compare the reference clock pulse and the clock pulse of the clock pulse data recovery device to generate the clock pulse data recovery signal phase Lock indicator. [0003] If the clock data recovery device is not based on the phas...

AI Technical Summary

Problems solved by technology

Therefore, the above method of generating clock pulse data to restore the signal phase lock indicator is not a good choice for users.

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