A method of locking a signal phase adaptively to a reference signal phase and a phase lock adaptive to the frequency of the reference signal

摘要

The invention relates to a method of locking a clock signal (FOUT) phase adaptively to the phase of different reference signals (FIN) and to a phase lock implementing the method. According to the invention, the frequency of an input reference signal is determined by measuring and the determined reference signal (FIN) is converted by dividing to a signal (FDIN), the frequency of which is some integer multiple of the frequency of the clock signal (FOUT) to be phase locked, or the frequency of the clock signal to be phase locked divided by some integer. The signal (FDIN) and the clock singal (FOUT) to be phase locked or a signal (FD) proportional thereto are used as reference signals of a phase comparator (2) for locking the clock signal phase in a manner known per se.