Patent ID: 6316898
Filing Date: 2001-11-13
Classification: G11B,H02P

Abstract:
An electronic device for a capacitor discharge over an extended time period through a voice coil of an actuator for a retraction and a final positioning of said actuator into a predetermined parking position, said device comprising:a) an initiation means to initiate said retraction;b) at least one capacitor for providing said energy flow; andc) a pulsed discharge circuit connected to said at least one capacitor and said voice coil, said pulsed discharge circuit comprising:1) a first switching means for periodically connecting said at least one capacitor with said voice coil;2) a second switching means for shorting a driving coil circuit of said voice coil while said at least one capacitor is disconnected from said voice coil;3) a control means to provide alternating closing of said first switching means and said second switching means.