Dynamic magnetic information storage or retrieval – Modulating or demodulating
Patent
1983-03-22
1986-09-02
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Modulating or demodulating
360110, 360111, 360 55, 369129, G11B 502, G11B 5127, G11B 2006
Patent
active
046099506
ABSTRACT:
A magnetic recording head apparatus includes: a magnetic head body opposing a travelling magnetic tape; a tuning circuit having the head body as a variable inductance element; a high-frequency signal source for generating a high-frequency signal; and a detector connected to the tuning circuit. The inductance of the head body is changed in accordance with a change in the magnetic signal field applied from the magnetic tape. The high-frequency signal is amplitude-modulated in accordance with the high-frequency signal. A peak or envelope waveform of the modulated high-frequency signal is detected by a detector, thereby obtaining a reproduced information signal.
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Chiba Shu
Sawazaki Norikazu
Bowler Alyssa H.
Cardillo Raymond F.
Tokyo Shibaura Denki Kabushiki Kaisha
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