Patents by Inventor Matteo Moioli

Matteo Moioli 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).

  • Digital control of the speed of a motor by a power stage driven in discontinuous mode
    Patent number: 6542324
    Abstract: A driving circuit for a voice coil motor (VCM) includes a full bridge output stage for driving the motor in a pulse width modulated (PWM) mode. A multiplexer having two inputs is coupled to respective output nodes of the full bridge output stage, with one of the output nodes providing a back electromotive force induced in the motor upon setting in a high impedance state the full bridge output stage and conducting at least one transistor connected to ground in the full bridge output stage after current through the motor has decayed to zero. A controller compares a voltage representing a desired speed of the motor with the back electromotive force, and generates a correction signal based upon the comparison.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: April 1, 2003
    Assignee: STMicroelectronics S.r.l.
    Inventors: Ezio Galbiati, Matteo Moioli