Patent ID: 6542039
Filing Date: 2003-04-01
Classification: G11B,H03L

Abstract:
A phase-locked loop apparatus for reading digital data recorded on a recording medium in a predetermined data format, and generating a reproduction clock for obtaining a reproduction digital signal, said apparatus comprising:a phase error information detection means for detecting phase error information from a signal area other than a single frequency data area comprising a single frequency in the data format; a frequency error information detection means for detecting frequency error information from the single frequency data area comprising the single frequency in the data format; and a feedback loop for performing control on the basis of the frequency error information in a single frequency data area and performing control on the basis of the phase error information in an area other than the single frequency data area so as to lock a phase of the reproduction clock and a phase of a clock component included in the reproduction digital signal on the basis of the phase error information and the frequency error information.