Adjustable voice coil motor driver
US7888902B2 · kind B2 · utility
1Cited by
21References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2007 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | May 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of configuring a signal for controlling a voice coil motor (VCM) is disclosed. A voltage at an error amplifier of a VCM driver is accessed. A target value at the error amplifier is accessed. A difference value between the target value and the voltage is determined. An impedance value of the variable compensation coupled with the error amplifier is adjusted, based on the difference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.