Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Reexamination Certificate
2007-01-16
2007-01-16
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
C324S076190
Reexamination Certificate
active
10824896
ABSTRACT:
A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method includes the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.
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Hara Takeyori
Hashimoto Shuichi
Kagami Yoshiyuki
Kosugi Tatsuhiko
Kubohara Ryuki
Fujitsu Limited
Greer Burns & Crain Ltd.
He Amy
Hirshfeld Andrew H.
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