Electricity: measuring and testing – Magnetic – Magnetic information storage element testing
Reexamination Certificate
2006-04-11
2006-04-11
LeDynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetic information storage element testing
C324S212000
Reexamination Certificate
active
07026810
ABSTRACT:
An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head1and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
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Futamoto Masaaki
Hirayama Yoshiyuki
Honda Yukio
Kikugawa Atsushi
Tanahashi Kiwamu
Hitachi , Ltd.
LeDynh Bot
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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