Defect detector circuit and magnetic disk certifier using the same defect detector circuit

A magnetic disk certifier includes a defect detector circuit comprising a low-pass filter for extracting a low frequency component of the read-out signal, the low frequency component containing a signal component of the error, a signal generator circuit for generating a signal having a predetermined...

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Bibliographic Details
Main Authors Funaki, Toshiharu, Honma, Shinji, Shitara, Kenichi, Mochiduki, Hideki
Format Patent
LanguageEnglish
Published 11.04.2002
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Summary:A magnetic disk certifier includes a defect detector circuit comprising a low-pass filter for extracting a low frequency component of the read-out signal, the low frequency component containing a signal component of the error, a signal generator circuit for generating a signal having a predetermined frequency lower than the frequency of the read-out signal, a synthesizer circuit for synthesizing an output signal of the low-pass filter and the signal outputted from the signal generator circuit and a comparator for generating an error signal by comparing the synthesized signal from the synthesizer circuit with a predetermined reference level.