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AssigneeNational Taiwan University
InventorsTSUNG-HSIEN LIN, CHENG-EN LIU, CHEN-CHIEN LIN, WEI-HAO CHIU, SUNG-LIN TSAI
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A frequency tracking circuit is disclosed. The frequency tracking circuit includes an edge selector, a phase-frequency processor and a digital controlled oscillator. The edge selector receives a data signal and feedback clock signal and sequentially outputs a data edge signal and a feedback-clock-edge signal. The phase-frequency processor receives the data edge signal and the feedback-clock-edge signal and outputs a frequency adjusting digital signal after executing differential operation according to a first phase difference and a second phase difference. The digital controlled oscillator receives the frequency adjusting digital signal so as to adjust frequency of the feedback clock signal. The phase-frequency processor outputs a frequency tracking signal to the edge selector, wherein the edge selector utilizes the frequency tracking signal for acquiring the data edge signal and utilizes the data edge signal for acquiring the feedback-clock-edge signal.
A frequency tracking circuit for a clock and data recovery circuit, the frequency tracking circuit comprising:
A frequency tracking method for a clock and data recovery circuit, and the clock and data recovery circuit includes a frequency tracking circuit, and the frequency tracking circuit includes an edge selector, a phase-frequency processor, a digital controlled oscillator, wherein the phase-frequency processor is connected to the edge selector, and the digital controlled oscillator is connected to the edge selector, and the frequency tracking method includes:
Dependencies are inferred from the claim text.