WAVEFORM SHAPING CIRCUIT SUITABLY ARRANGED FOR OPTICALLY RECORDING AND REPRODUCING APPARATUS

摘要

A waveform shaping circuit has a waveform equalizer, an envelope equalizer, a slice signal generator, and a comparator. The waveform equalizer serves to waveform-equalize an optical readout signal, and compensates for interference between code bits. The envelope equalizer serves to envelope-equalize the output signal of the waveform equalizer. The envelope-equalized signal is sent from the envelope equalizer to the slice signal generator. The slice signal generator stabilizes the slice signal. The outputs of the waveform equalizer and the slice signal generator are applied as inputs of the comparator. The comparator serves to compare both inputs with each other and produce a binary reproduction signal therefrom.