Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier
Reexamination Certificate
2005-09-20
2005-09-20
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of the amplifier
C360S046000
Reexamination Certificate
active
06947239
ABSTRACT:
A magnetic storage device equipped with a write driver circuit is provided. This magnetic storage device includes: four current sources each provided at a corresponding one of the four sides of an “H-bridge” circuit; a magnetic head provided at the bridging part of the “H-bridge” circuit; and a series circuit including capacitors and terminating resistors. A separate series circuit is provided between the ground and each corresponding one of the connection points of the bridging part and the four sides of the “H-bridge” circuit. With this magnetic storage device, impedance matching can be easily performed. Also, a smaller circuit size can be realized, and accordingly, the power consumption can be reduced. Furthermore, desired recording can be performed at a high transfer rate.
REFERENCES:
patent: 6121800 (2000-09-01), Leighton et al.
patent: 2000-207796 (2000-07-01), None
patent: 2000207796 (2000-07-01), None
Fujitsu Limited
Greer Burns & Crain Ltd.
Hudspeth David
Negrón Daniell L.
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