Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Reexamination Certificate
2005-03-15
2005-03-15
Faber, Alan T. (Department: 2651)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
C360S067000
Reexamination Certificate
active
06867938
ABSTRACT:
A digital information reproducing apparatus using rotary heads that reproduces digital information signals recorded on a magnetic tape using magneto resistive heads installed on a rotary drum. The apparatus includes, in the fixed side of the apparatus, a magnetic tape checking circuit that checks the type of the magnetic tape; and a control signal generation circuit that generates a control signal for controlling the gain of a reproduction amplifier circuit; and on the rotary drum, a decoder circuit that identifies the control signal transmitted from the control signal generation circuit. The control signal generation circuit generates the control signal based on a checking result given by the magnetic tape checking circuit, and the decoder circuit identifies the transmitted control signal to control the gain of the reproduction amplifier circuit.
REFERENCES:
patent: 6243240 (2001-06-01), Ozue et al.
patent: 6717761 (2004-04-01), Yamazaki et al.
patent: 10-177924 (1998-06-01), None
Masuda Kenmei
Yamazaki Shigeru
Faber Alan T.
Hitachi , Ltd.
Townsend and Townsend / and Crew LLP
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