Dynamic magnetic information storage or retrieval – Checking record characteristics or modifying recording...
Patent
1995-09-19
1997-04-29
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Checking record characteristics or modifying recording...
360 27, 360 66, 360 31, 360 68, G11B 502
Patent
active
056255039
ABSTRACT:
A magnetic recording and reproducing apparatus records a signal on a recording track of a magnetic recording medium in a recording mode and reproduces the signal from the recording track of the magnetic recording medium in a reproducing mode. The apparatus includes a rotary drum having at least first and second magnetic heads having gaps with mutually different azimuth angles, an erasing circuit for erasing the signal recorded on the recording track of the magnetic recording medium by supplying a high-frequency current to the first magnetic head in a state where the magnetic recording medium which makes contact with the rotary drum is stationary, a recording circuit for supplying a predetermined signal to the second magnetic head so as to record the predetermined signal on the recording track which is erased by the erasing circuit, a detector for detecting the predetermined signal by immediately reproducing by the second magnetic head the predetermined signal which is recorded on the recording track by the recording circuit, and a controller including a mechanism for discriminating a signal recording and reproducing characteristic of the magnetic recording medium based on the predetermined signal detected by the detector.
REFERENCES:
patent: 4879609 (1989-11-01), Kozuki
patent: 5196967 (1993-03-01), Mederer
patent: 5452146 (1995-09-01), Okamoto
Faber Alan
Psitos Aristotelis
Victor Company of Japan Ltd.
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