APPARATUS AND METHOD FOR CLOCK RECOVERY

摘要

The present invention discloses a clock recovery method. The method includes: after converting an analog signal to a digital signal, performing phase discrimination and filtering processing for the digital signal to obtain a digital clock error signal; and converting the digital clock error signal to a control voltage signal, controlling a voltage-controlled oscillator according to the control voltage signal to generate a synchronous clock. The present invention also discloses a clock recovery apparatus. The apparatus includes an analog-to-digital converter (100), a digital signal processing circuit (200), a digital-to-analog converter (300) and a voltage-controlled oscillator (400) which are connected in turn, wherein the voltage-controlled oscillator (400) is also connected with the analog-to-digital converter (100). The present invention also discloses a coherent receiver. The receiver includes a mixer (600) and a clock recovery apparatus connected with the mixer. The present invention can provide a reference clock for chips in a digital circuit.