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

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 dr...

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Bibliographic Details
Main Authors Otte, Rob, Compter, Johan Cornelis, Cremers, Franciscus Lambertus Maria
Format Patent
LanguageEnglish
Published 24.08.2010
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Summary: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.