Gerät zum Empfangen eines Digitalsignals.

摘要

The apparatus for receiving a digital signal in which synchronization data is inserted at a predetermined period and in which a timing signal in synchronism with the synchronization data is developed from a digitally modulated input digital comprises a circuit (21) for generating detection signals (S1,S2) indicative of a sampling frequency of the input digital signal (RX) on the basis of the synchronization data; a first window generating circuit (4) for generating signals of different frequency based on stable clock signals and using the detecting signals to select one of the signals as a first reference signal (RE1); a second window generating circuit (5) for generating a second reference signal (HE2) in synchronism with the synchronization data on the basis of an output signal from a phase-locked loop (7); and a selector (6) for supplying the first reference signal (RE1) to the phase-locked loop (7) for a period during which the loop becomes stable and supplying the second reference signal (RE2) to the phase-locked loop (7) after expiration of the period , thereby enabling the generation of stable timing signals with respect to an input digital signal having different sampling frequencies.