Systems for and methods for fast mode hop detection and correction for hard disk drive recording systems
US12170100B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2023 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Oct 27, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A solution can detect an HDD laser mode hop within an improved response time using a sensor amplification circuitry balanced by a frequency response of a gain stage circuit. A sensor of a first circuit can receive an optical signal of a laser as input and output a first voltage that an amplifier can amplify to produce an amplified first voltage indicative of a mode hop event trailing the optical signal by a first response time of a first frequency response. A second circuit coupled in series with the first circuit and operating according to a second frequency response an inverse of the first frequency response can receive the amplified first voltage and generate, based at least on the amplified first voltage adjusted by the second frequency response, a second voltage indicative of the mode hop event within a second response time that is shorter than the first response time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.