Magnetic medium storage apparatus with read channel having a programmable write-to-read suppression
US6424480B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1999 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Sep 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic storage apparatus includes first and second control devices to effectively reduce a disturbance which occurs in a read channel of the apparatus upon transition from a write mode to a read mode. The first control device is in a first gain stage coupled to a read sensor. The second control device is a back-end circuit and, in addition to reducing the duration of the write-to-read disturbance, is effective to significantly reduce offset of the apparatus. A user interface in the form of a serial interface allows user programmability of both of the first and second control devices. The serial interface and the read channel with the first and second control devices are embodied in a pre-amplifier integrated circuit. The programmability affords flexibility to the IC manufacturer as well as to the manufacturer of the magnetic storage device in optimizing the read channel to account for model-to-model and unit-to-unit variations in the write-to-read disturbance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.