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 Title: |
US5777829:
Method and apparatus for providing electrostatic discharge protection for an inductive coil of a magnetic transducer
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Voldman, Steven H.; South Burlington, VT
Wallash, Albert J.; Morgan Hill, CA
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| Assignee: |
International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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| Published / Filed: |
1998-07-07
/ 1996-10-08
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| Application Number: |
US1996000728297
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| IPC Code: |
Advanced:
G11B 5/31;
G11B 5/40;
G11B 5/17;
Core:
more...
IPC-7:
G11B 5/10;
G11B 5/17;
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| ECLA Code: |
G11B5/31B; G11B5/31D8A2; G11B5/40;
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| U.S. Class: |
Current:
360/128;
360/123.18;
G9B/005.078;
G9B/005.088;
G9B/005.143;
Original:
360/128;
360/123;
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| Field of Search: |
360/103,123,126,128
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| Priority Number: |
| 1996-10-08 |
US1996000728297 |
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| 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.
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| Attorney, Agent or Firm: |
Merchant, Gould, Smith, Edell, Welter & Schmidt, P.A. ;
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| Primary / Asst. Examiners: |
Heinz, A. J.;
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 35 claims |
What is claimed is:
1. A inductive head assembly, comprising:
- an inductive coil having a first turn and a last turn; and
- an electrostatic discharge element, electrically coupled to the inductive coil, for dissipating electrostatic charge from the inductive coil, the electrostatic discharge element being electrically coupled across the first and last turns of the inductive coil.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 12 U.S. patent(s) that reference this one
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