Synchronous servo channel for longitudinal position detection and position error signal generation in tape drive systems
US7245450B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2006 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jan 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fully synchronous longitudinal position (LPOS) detection system is provided for improving the reliability of servo channels in tape systems. The system is based on the interpolation of the servo channel output signal, which is sampled by an analog-to-digital converter (ADC) at a fixed sampling rate, using a clock at a nominal frequency, so that interpolated signal samples are obtained at a predetermined fixed rate, independent of tape velocity. This predetermined fixed rate is defined in terms of samples per unit of length, as opposed to samples per unit of time, which is the measure of the ADC sampling rate. The resolution with which the servo channel signal is obtained at the interpolator output is thus determined by the step interpolation distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.