Servo channel hybrid analog-digital high pass filter
US9269385B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2014 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Oct 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for storing data includes a storage medium, a head assembly disposed in relation to the storage medium and operable to read and write data on the storage medium, an analog high pass filter operable to filter an output from the head assembly to yield a filtered analog signal, wherein a high pass corner frequency of the analog high pass filter is below a servo data frequency in the data, an analog to digital converter operable to sample the filtered analog signal to yield digital samples, and a digital filter operable to perform pole-zero compensation for the analog high pass filter on the digital samples to yield filtered digital samples, with a zero at the high pass corner frequency of the analog high pass filter, and with a pole at a frequency higher than the high pass corner frequency of the analog high pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.