公开(公告)号：IT1395850B1

公开(公告)日：2012-10-26

申请号：ITMI20091675

申请日：2009-09-30

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO

公开(公告)号：IT1390777B1

公开(公告)日：2011-09-23

申请号：ITVA20080040

申请日：2008-07-01

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO

公开(公告)号：DE602006016089D1

公开(公告)日：2010-09-23

申请号：DE602006016089

申请日：2006-06-09

Applicant: ST MICROELECTRONICS SRL

Inventor： MAIOCCHI GIUSEPPE ,  GALBIATI EZIO ,  BOSCOLO BERTO MICHELE

IPC: G11B15/18 ,  H02P6/08 ,  H02P7/00

公开(公告)号：ITVA20080040A1

公开(公告)日：2010-01-02

申请号：ITVA20080040

申请日：2008-07-01

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO

公开(公告)号：ITVA20070068A1

公开(公告)日：2009-02-02

申请号：ITVA20070068

申请日：2007-08-01

Applicant: ST MICROELECTRONICS SRL

Inventor： CASSIANO MICHELE ,  GALBIATI EZIO

公开(公告)号：ITVA20070065A1

公开(公告)日：2009-01-26

申请号：ITVA20070065

申请日：2007-07-25

Applicant: ST MICROELECTRONICS SRL

Inventor： CASSIANO MICHELE ,  GALBIATI EZIO

公开(公告)号：DE60202436D1

公开(公告)日：2005-02-03

申请号：DE60202436

申请日：2002-02-19

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO ,  BOSCOLO MICHELE

IPC: H02M7/5387 ,  H02P25/02 ,  H02P7/00 ,  G11B5/55

Abstract: The present invention relates a Pulse Width Modulation (PWM)/linear driver for an electromagnetic load by a bridge circuit (15) of the type having a signal input (Vm, GND) and a signal output (OutM, OutP) and at least two conduction control inputs (C1, C2) for driving a voice coil motor (VCM) in a linear mode and in a pulse width modulation (PWM). The bridge circuit (15) is driven by a PWM converter (16) coupled to one (C1) of said two control inputs and by a linear amplifier (17) coupled to the other (C2) of said two control inputs.

公开(公告)号：DE69721757T2

公开(公告)日：2003-11-13

申请号：DE69721757

申请日：1997-08-08

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO ,  BOSCOLO MICHELE ,  BERTOLINI LUCA

IPC: H02P6/08 ,  H02P6/28 ,  H02P1/00

Abstract: The control of the current in PWM mode through independently controlled windings of a multiphase motor driven in a "bipolar" mode is implemented by employing only two sense resistors and related control loops, regardless of the actual number of windings.

公开(公告)号：IT1318988B1

公开(公告)日：2003-09-19

申请号：ITMI20002176

申请日：2000-10-09

Applicant: ST MICROELECTRONICS SRL

Inventor： BRAMBILLA MASSIMILIANO ,  NESSI MAURIZIO ,  GALBIATI EZIO

IPC: G11B21/10 ,  G11B21/08 ,  H02P25/06 ,  H03F3/187 ,  H03F3/30

Abstract: A control circuit providing a driving current to a voice coil motor to position a reading and writing head of a disk memory system is described. The circuit comprises a first and a second class AB amplifiers the outputs of which are connected to the terminals of a first resistor in series with the voice coil motor so that a current passes through the voice coil motor and through the first resistor. The circuit comprises a sense amplifier the input terminals of which are coupled with the terminals of said first resistor, a device at the input of which is present a signal which is a sum of an external signal and of an output signal of the sense amplifier. The first amplifier and the second amplifier being driven in inverted phase by an output signal produced by the device. The circuit comprises means for inserting a second resistor in series with the first resistor so that said current passes through the series of said first and said second resistors and so that said sense amplifier has the input terminals coupled with the terminals of said series of resistors.

公开(公告)号：DE69721757D1

公开(公告)日：2003-06-12

申请号：DE69721757

申请日：1997-08-08

Applicant: ST MICROELECTRONICS SRL

Inventor： GALBIATI EZIO ,  BOSCOLO MICHELE ,  BERTOLINI LUCA

IPC: H02P6/08 ,  H02P6/28 ,  H02P1/00

Abstract: The control of the current in PWM mode through independently controlled windings of a multiphase motor driven in a "bipolar" mode is implemented by employing only two sense resistors and related control loops, regardless of the actual number of windings.