Method and device for generating a clock signal that is coupled to a reference signal

摘要

In order to generate a clock signal (f_T1) that is coupled to a reference signal (FBAS), especially to an analog video signal, a free-running clock pulse (f_T1) is generated from a high-frequency clock pulse (f₀) and the reference signal (FBAS) is digitized therewith. In addition, a second clock pulse (f_T1) is generated from the high-frequency clock pulse (f₀) and the phase deviation between the first clock pulse (f_T2) and the second clock pulse (f_T1) is determined. The digitized sampling values of the reference signal (FBAS) at the first clock frequency (f_T1) are converted, according to the phase deviation determined, into corresponding digitized sampling values having the second clock frequency (f_T1) and are used as a target specification for generating the second clock pulse (f_T1) thus coupled to the reference signal.