Method and apparatus for protecting magnetoresistive heads from electrostatic discharge
US7502207B2 · kind B2 · utility
1Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Aug 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for providing electrostatic discharge protection for a disc drive read head. A pair of depletion mode MOSFETS, and a fuse associated with each are disposed between the read head output terminals. The MOSFETS are controlled to an “off” state for testing the preamplifier prior to assembly of the read head. After assembly of the head, a second pair of MOSFETS is gated to an “on” state to open the fuses and thus permit normal operation of the read head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.