Title :
Single-pass flaw detector for magnetic media
Author_Institution :
Seagate Technol., Scotts Valley, CA, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
A simple flaw detector that enables reliable single-pass defect location in magnetic media is described and analyzed. The envelope of the playback signal is detected in a phase-independent manner, small variations in envelope indicate the presence of a defect. The detector may be configured as a biased or unbiased estimator of the envelope of the input signal. Synchronous, asynchronous, analog, digital, biased, and unbiased forms are discussed
Keywords :
flaw detection; magnetic disc storage; magnetic thin films; storage media; analog type; asynchronous type; biased estimator; defect location; digital type; magnetic media; playback signal envelope; single-pass flaw detector; synchronous type; unbiased estimator; Background noise; Band pass filters; Costs; Drives; Envelope detectors; Error correction codes; Magnetic analysis; Magnetic flux; Phase detection; USA Councils;
Journal_Title :
Magnetics, IEEE Transactions on
