Circuit Arrangement and Method for Locking onto and/or Processing Data, in Particular Audio, T[ele]v[ision] and/or Video Data

Abstract

In order to further develop a circuit arrangement (100; 102; 104; 106) and a method of locking onto and/or processing data, in particular audio, T[ele]V[ision] and/or video data, by means of at least one phase locked loop (40), wherein phase information is detected by means of at least one phase detector (44), in particular following the arrival of at least one rising edge and/or falling edge of at least one analog input signal (50; 50), at least one increment (24) is determined by means of at least one loop filter (30), to which the output signal (56) which is output by the phase detector (44) is fed, and at least one ramp oscillator (46) is fed the increment (24) which is output by the loop filter (30), such that inter alia the circuit arrangement (100; 102; 104; 106) and the method for operating the same can be readily adapted to various requirements, it is proposed that the phase locked loop (40) is essentially digital, wherein the input signal (50; 50), in particular the phase of the input signal (50; 50) can be digitized by means of at least one time-to-digital converter (42), to which at least one system clock (52) is fed, the phase detector (44) is fed the output signal (54), in particular the additional phase information, of the time-to-digital converter (42) and also at least a first output signal (62a), in particular at least one status signal, of the ramp oscillator (46), and at least one frequency detector (48) is fed at least a second output signal (64), in particular at least one overflow pulse, of the ramp oscillator (46) and outputs frequency information (58) to the loop filter (30), which in particular is also assigned to at least one frequency locked loop (10).

Dependencies are inferred from the claim text.