Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1996-10-08
1998-07-07
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Head accessory
360123, G11B 510, G11B 517
Patent
active
057778299
ABSTRACT:
Electrostatic discharge protection for an inductive coil in a magnetic head of a disk drive. Structures are provided to dissipate electrostatic charges which may arise between the leads of the inductive coil or between the inductive coil and one of the pole pieces in a magnetic head. An electrostatic discharge element is coupled to the inductive coil for dissipating electrostatic charge from the inductive coil. The electrostatic discharge element may include a spark gap, a diode circuit, a MOSFET, a silicon controlled rectifier or a bleed transistor circuit. The electrostatic discharge element may include a first electrostatic discharge element coupled between the first turn of the inductive coil and the magnetic yoke and a second electrostatic discharge element coupled between the magnetic yoke and the last turn of the inductive coil. The magnetic yoke or pole piece may include an upper and a lower magnetic pole with mirrored protection circuits provided for each pole.
REFERENCES:
patent: 3975771 (1976-08-01), Lazzari
patent: 4305115 (1981-12-01), Armitage
patent: 4317149 (1982-02-01), Elser et al.
patent: 4800454 (1989-01-01), Schwarz et al.
patent: 4841395 (1989-06-01), Craft
patent: 4945434 (1990-07-01), Wilmer et al.
patent: 4958255 (1990-09-01), Pritchard
patent: 4987514 (1991-01-01), Gailbreath et al.
patent: 5142425 (1992-08-01), Gailbreath, Jr. et al.
patent: 5315472 (1994-05-01), Fong et al.
patent: 5491605 (1996-02-01), Hughbanks
patent: 5539598 (1996-07-01), Denison
patent: 5566038 (1996-10-01), Keel
patent: 5587857 (1996-12-01), Voldman
patent: 5638237 (1997-06-01), Phipps
Voldman Steven H.
Wallash Albert J.
Heinz A. J.
International Business Machines - Corporation
LandOfFree
Method and apparatus for providing electrostatic discharge prote does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for providing electrostatic discharge prote, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for providing electrostatic discharge prote will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1212765