Offset compensator and optical disc drive using the same

摘要: The generation of a pseudo-lock is prevented in JFB offset compensator whose use has been conventionally limited due to tendency generate the pseudo-lock, and performance degradation PLL Viterbi decoder suppressed. A means for monitoring an read signal provided independently from compensator. With this configuration, or possibility can be detected reset integrator. In order reduce influence large sporadic triggering there may also limitter limiting absolute value inputted integrator compensation signal.