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High Track Density Magnetic Recording Readback

IP.com Disclosure Number: IPCOM000095276D
Original Publication Date: 1965-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Nassimbene, EG: AUTHOR

Abstract

In this magnetic head-tape playback technique, the head is vibrated at an amplitude of one track width. In is vibrated at a frequency somewhat higher than the greatest recorded frequency. The difference in outputs of the head, when it is at the extremes of its travel, is taken as a signal. This should be the recording in one track. Magnetic head 10 is shown in two positional extremes as vibrated transversely to the travel of tape 11 by vibrator 12. The left position shows extension over tracks 13, 14, 15 and 16. The right position shows extension over only tracks 14, 15 and 16. The vibration distance 17 is approximately the width of one track. Thus, the output signal of head 10 is modulated by the vibration. Such output is detected to provide a difference signal representing the output of track 13.

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High Track Density Magnetic Recording Readback

In this magnetic head-tape playback technique, the head is vibrated at an amplitude of one track width. In is vibrated at a frequency somewhat higher than the greatest recorded frequency. The difference in outputs of the head, when it is at the extremes of its travel, is taken as a signal. This should be the recording in one track. Magnetic head 10 is shown in two positional extremes as vibrated transversely to the travel of tape 11 by vibrator 12. The left position shows extension over tracks 13, 14, 15 and 16. The right position shows extension over only tracks 14, 15 and 16. The vibration distance 17 is approximately the width of one track. Thus, the output signal of head 10 is modulated by the vibration. Such output is detected to provide a difference signal representing the output of track 13. The frequency of vibration is set significantly higher than the highest recorded frequency so that head 10 reads the same bit at its extremes of travel.

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