the evaluation signal generation unit, a focus bias adjustment method and adjustment method of the deflection (Producing apparatus and method of estimate signal for focus bias and skew adjustment of disk driver

摘要

the simple structure of the appropriate signals for evaluation of a readout data signal, and the readout data signal, and the synchronization, the clock signal generated by the detection of the phase error information, the phase error information of the signal, and the phase error uc544ub0a0ub85c amount according to the signal level of the signal, with the output. the evaluation of the signal of the signal quality evaluation to the evaluation of the parts of the signal, a / d conversion and fill.