Input pole compensation for a disk drive read head
US6710959B1 · kind B1 · utility
14Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2000 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Feb 25, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0013
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adjustable impedance boosting circuit for a magneto-resistive head in a gain stage beyond the input gain stage. The boosting circuit compensates for a frequency pole of the head leads by introducing a zero in proportion to the resistance of the magneto-resistive element and with selectable circuit parameters to further adjust the pole compensation. The invention includes selectively adjusting the sensitivity of the pole compensation to changes in the resistance of the head, selectively adjusting the peak compensation, and adjusting the frequency of the compensating zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.