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AssigneeTexas Instruments Incorporated
InventorsJulio Enrique Ayala, II, Juergen Luebbe
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A system for implementing current shaping for retract of a voice coil motor (VCM) includes drive circuitry coupled to drive the VCM according to a logic state of the system. Current shaping circuitry is configured to temporarily decrease the bandwidth of a VCM transconductance loop in response to a control signal. The transconductance loop includes at least the VCM, the current shaping circuitry and the drive circuitry. The system also includes logic configured to provide the control signal at an end portion a drive logic state to enter a current shaping logic state as a transition from the drive logic state to a floating logic state to reduce current through the VCM such that acoustic emissions from the VCM are mitigated during the retract.
A system for performing retract of a voice coil motor (VCM), the system comprising:
A system for reducing acoustic noise of a voice coil motor (VCM) during retract, the system comprising:
A method for controlling an actuator during retract of an actuator arm, the actuator forming part of a transconductance loop, the method comprising:
Dependencies are inferred from the claim text.