Method for driving an actuator, actuator drive, and apparatus comprising an actuator

Rob Otte (Inventor), J.C. Compter (Inventor), F.L.M. Cremers (Inventor)

Research output: PatentPatent publication

31 Downloads (Pure)

Abstract

An actuator driver circuit includes a drive signal source and an electrical damping element having a negative resistance connected in series with the drive signal source. A controllable switch is provided for selectively switching the electrical damping element into or put of a signal path from a drive signal source output to a driver circuit output, in order to selectively change the electrical damping of an actuator. For example, the electrical damping of a radial actuator or a focus actuator of an optical disc drive is increased in case of loss of track or loss of focus.
Original languageEnglish
Patent numberUS7782720
Publication statusPublished - 24 Aug 2010

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