摘要:
The invention relates to a device for extracting a clock signal and digital data from a baseband serial signal, including a circuit (19) for sampling the signal received and a clock extraction circuit (12) comprising: an injection-locked oscillator (19), a phase-lock loop (25) and a phase pulse generator circuit (30) that delivers a pulse signal at the frequency of the received signal fronts with a pulse amplitude and duration adapted to the operating characteristics of the phase-lock loop (25). According to the invention, at least one phase shifter circuit (37) introduces a constant pre-determined phase shift to ensure phase alignment of the inputs (17, 18) of the sampling circuit (15).
摘要:
The invention relates to a device for extracting a clock signal from a baseband serial signal, consisting of: an injection-locked oscillator (19), and a phase-lock loop (25) including a digital phase detector (26). The oscillator (19) includes a digital input (24) for controlling the value of the frequency thereof and the phase-lock loop (25) includes a counting circuit (30, 35) which totals the relative values of the digital signal delivered by the digital phase detector (26) and delivers a digital control signal for the oscillator (19).
摘要:
The invention relates to a device for extracting a clock from a base band serial signal comprising an oscillator (19) locked injection-wise, a phase feedback control loop (25) comprising a digital phase detector (26). The oscillator (19) comprises a digital input for controlling the value of its natural frequency and the phase feedback control loop (25) comprises a counting circuit comprising a first stage (91) delivering a low-order signal and a second (92) adapted so as to deliver a control signal in digital form for the oscillator (19).