Method of reducing a frequency-response peaking of a magneto-resistive preamplifier in a mass data storage device, or the like
US6631044B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | Oct 7, 2003 |
| Priority date | — |
| Expiry date | Feb 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45722
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mass data storage device system (70) and method for providing frequency compensation within it are disclosed. The system has a moving media (72) that contains signals encoded in oriented magnetic domains that are detected by a magneto-resistive head (78) positioned in proximity thereto. An amplifier stage (100 or 120) is connected to sense the change in the electrical characteristic of the head, and capacitors (102-105 or 126-131) are operatively connected within the amplifier stage to produce two or three poles in a frequency response of the amplifier stage to reduce a second order frequency response of the head. Preferably, the poles have substantially identical pole locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.