Head positioning control system and method for a memory device using even and odd track cross pulses
US5025330A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1988 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Sep 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a head positioning control system and control method for a storage device which maintains the high speed and high density of head positioning and simultaneously lightens the load of the microprocessor or other control circuit used for the head positioning to enable realization by an inexpensive control circuit even with even higher speed operation of the head and/or higher densities of the recording medium. The control system is provided with track cross pulse generation unit able to output either odd or even track cross pulses (PODD or PEVEN) based on position information showing the crossing of the tracks of the recording medium by the head. The control circuit (a) sets, before the start of the speed control, the track cross pulse generation unit so that the odd track cross pulses are output from the track cross pulse generation unit when the target track is odd in number and so that the even track cross pulses are output when the target track is even in number and then performs speed control on the head drive actuator to position the head at the target track, (b) when the first track cross pulse is input, refreshes the track movement balance (DIFF) in accordance wit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.