Recovering a signal without a phase locked loop

摘要

An arrangement for recovering a first digital signal ( 7,31 ) from a digital input signal ( 20 ) comprises a digital filter ( 29 ) for filtering the digital input signal ( 20 ), a digitally controlled oscillator 28 for generating a digital reference signal ( 21 ) and a digital phase detector ( 22 ) for determining a phase difference ( 25 ) between the filtered digital input signal ( 27 ) and the digital reference signal ( 21 ). The first digital signal ( 7, 31 ) can be recovered by adding the determined phase difference ( 25 ) to the phase of the digital reference signal ( 21 ).