Interleaved finite impulse response (FIR) filter functions for servo and data detection in a direct access storage device (DASD)
US6233598A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Sep 11, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An interleaved finite impulse response (FIR) filter apparatus is provided for data detection in a direct access storage device. The FIR filter includes a plurality of sample and hold circuits. Each sample and hold circuit samples an input signal sequentially at a clock rate. At least one set of multiple multipliers is coupled to the plurality of sample and hold circuits. Each multiplier multiplies a sample by a predefined value and provides a multiplier product at the clock rate. At least a pair of summing functions are coupled to the set of multipliers. Each summing function adds a predetermined combination of respective multiplier products and provides at least a pair of interleave outputs. Each of the interleave outputs is provided at less than the clock rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.