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Browse Prior Art Database

Pulse Recording

IP.com Disclosure Number: IPCOM000073703D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 19K

Publishing Venue

IBM

Related People

Watts, RZ: AUTHOR [+2]

Abstract

Frequency response of magnetic media is normally limited by bit packing and upper frequency response of the recording channel. Extremely short duration pulses can be recorded by splitting the recording between two or more tracks. Pulses 10 to be recorded have a duration too short to be faithfully recorded on a given magnetic media. A two-track system is shown wherein track 1 records a transition for each leading edge of pulses 10. In track 2, a transition is recorded for each trailing edge of pulses 10. While reading back the recorded tracks 1 and 2, the detected transitions in track 1 are used to set a latch. The transitions detected in track 2 are used to reset that latch. The output signal of the latch is a faithful reproduction of pulses 10.

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Pulse Recording

Frequency response of magnetic media is normally limited by bit packing and upper frequency response of the recording channel. Extremely short duration pulses can be recorded by splitting the recording between two or more tracks. Pulses 10 to be recorded have a duration too short to be faithfully recorded on a given magnetic media. A two-track system is shown wherein track 1 records a transition for each leading edge of pulses 10. In track 2, a transition is recorded for each trailing edge of pulses 10. While reading back the recorded tracks 1 and 2, the detected transitions in track 1 are used to set a latch. The transitions detected in track 2 are used to reset that latch. The output signal of the latch is a faithful reproduction of pulses 10.

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