Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Reexamination Certificate
2005-09-06
2005-09-06
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
C360S067000
Reexamination Certificate
active
06940673
ABSTRACT:
A magnetic reproducing device which includes a signal detecting means for detecting a signal from a magnetic recording medium by a coil, an amplifying means for amplifying the signal detected by the signal detecting means, a filtering means for filtering the signal amplified by the amplifying means, and a capacitor connected in parallel to the coil of the signal detecting means. In this device, the actual resonance frequency of a resonance circuit including the coil, the capacitor and a floating capacitance is set to be four to eight times the maximum reproduced frequency, thereby attenuating the high-frequency high-energy electromagnetic noise inputted to the magnetic reproducing device.
REFERENCES:
patent: 4656533 (1987-04-01), Sakai et al.
patent: 5671098 (1997-09-01), Mathews et al.
patent: 6249398 (2001-06-01), Fisher et al.
Goto Satoshi
Tada Kiyoshi
Takiguchi Junji
Frommer William S.
Frommer & Lawrence & Haug LLP
Hudspeth David
Lee Samuel S.
Negrón Daniell L.
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