Data storage device measuring resonant frequency of a shock sensor by inserting the shock sensor into an oscillator circuit
US9620160B1 · kind B1 · utility
4Cited by
327References
19Claims
0Family size
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a disk, a head, a shock sensor, and an oscillator circuit responsive to the shock sensor and configured to generate an oscillating signal using positive feedback. A resonant frequency of the shock sensor is detected based on the oscillating signal. A physical shock affecting the head actuated over the disk is detected based on a response of the shock sensor to the physical shock and based on the detected resonant frequency of the shock sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.