Etron Technology, Inc.

Ming-Kia Chen

Kuo-Cyuan Kuo

Yu-Chiun Lin

Hsuan-Ching Chao

Huei-Chiang Shiu

A 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, and outputs a plurality of alternating current terms corresponding to an output clock from the plurality of alternating current terms according to the output clock. The alternating current estimator executes a discrete cosine transform and a discrete sine transform on a plurality of alternating current terms outputted 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 data recovery phase locked indicator according to a comparing result.

Circuit for generating a clock data recovery phase locked indicator and method thereof

An equalizer includes an oversampling logic unit, a direct current setting unit, and an alternating current setting unit. The oversampling logic unit oversamples data from a channel to generate a plurality of direct current terms and a plurality of alternating current terms according to an oversampling clock, and outputting a plurality of direct current terms corresponding to an output clock and a plurality of alternating current terms corresponding to the output clock according to the output clock. The direct current setting unit adjusts a direct current setting of the equalizer according to a plurality of direct current terms inputted by the oversampling logic unit within a first predetermined time. And the alternating current setting unit adjusts an alternating current setting of the equalizer according to a plurality of alternating current terms inputted by the oversampling logic unit within the first predetermined time.

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Taoyuan County, Taiwan

Ming-Kia Chen