Magnetic disk write channel with damping network
US6307695A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Mar 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for writing information to a magnetic medium includes an inductive head and a write amplifier coupled to the inductive head. The write amplifier receives an information signal, and amplifies the signal to provide a current through the inductive head to generate a flux at the inductive head which flux writes a bit of the information on the magnetic medium. The current for each bit of information is characterized by a rising portion, a peak portion, and a settling portion. A damping network is coupled to the inductive head, and couples a low impedance path to the head and the write amplifier, after the current reaches the peak portion, to divert current from the head to reduce a duration of the settling portion of the current. The write amplifier and damping network are embodied together in an integrated circuit, and are programmable via a serial interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.