Patents by Inventor Frederic Pascal Bonvin

Frederic Pascal Bonvin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stopping method for a spindle motor and related device
    Patent number: 8614859
    Abstract: A method and circuit to stop a spindle motor in the absence of the external supply voltage in which the spindle motor is structured to move a hard disk provided with at least one reading or writing head moved by a voice coil motor, the spindle motor provided with a plurality of coils. The method includes rectifying the backelectromotive force of the spindle motor to produce a braking current, driving the voice coil motor with at least a portion of the braking current until the speed of the spindle motor becomes lower than a predetermined stop speed, and, after the parking of the at least one reading or writing head of the voice coil motor, stopping the spindle motor by short-circuiting the coils of the spindle motor.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: December 24, 2013
    Assignees: STMicroelectronics S.r.l., STMicroelectronics, Inc.
    Inventors: Ezio Galbiati, Frederic Pascal Bonvin
  • STOPPING METHOD FOR A SPINDLE MOTOR AND RELATED DEVICE
    Publication number: 20100246051
    Abstract: A method and circuit to stop a spindle motor in the absence of the external supply voltage in which the spindle motor is structured to move a hard disk provided with at least one reading or writing head moved by a voice coil motor, the spindle motor provided with a plurality of coils. The method includes rectifying the backelectromotive force of the spindle motor to produce a braking current, driving the voice coil motor with at least a portion of the braking current until the speed of the spindle motor becomes lower than a predetermined stop speed, and, after the parking of the at least one reading or writing head of the voice coil motor, stopping the spindle motor by short-circuiting the coils of the spindle motor.
    Type: Application
    Filed: March 31, 2010
    Publication date: September 30, 2010
    Applicants: STMICROELECTRONICS S.R.L., STMICROELECTRONICS, INC.
    Inventors: Ezio Galbiati, Frederic Pascal Bonvin