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    APPARATUS AND METHOD FOR INCREASING MINUTENESS UPON CONVERSION OF DIGITAL DATA INTO FULL-BRIDGE OUTPUT STAGE DRIVING PWM SIGNAL
    1.
    发明专利
    APPARATUS AND METHOD FOR INCREASING MINUTENESS UPON CONVERSION OF DIGITAL DATA INTO FULL-BRIDGE OUTPUT STAGE DRIVING PWM SIGNAL 失效

    公开(公告)号：JPH11103586A

    公开(公告)日：1999-04-13

    申请号：JP20384998

    申请日：1998-07-17

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAIOCCHI GIUSEPPE ,  GALBIATI EZIO

    IPC: H02M7/5387 ,  H02P6/08 ,  H02P7/06 ,  H03M1/82 ,  H02M7/48

    Abstract: PROBLEM TO BE SOLVED: To improve current control of an actuator by utilizing an up-down signal of a counter and two least significant bits (LBS) to select one set of data to be compared from four data values, thereby improving minuteness. SOLUTION: A *VAL value of a corrected value of a VAL value is calculated from the VAL value. Two selected digital values are input to respective two N-bit registers. Numeric values increased by '1' are stored in another two N-bit registers. The two LBSs of the input values are sent to a multiplexer, which, in turn, decides three intermediate levels between the two values dynamically indicated by N bits. Two complement LSBs are sent to a least digital circuit which, in turn, judges how long a basic duty cycle is elongated or contracted. Thus, a duty cycle different according to the two LSB values of a reference signal to be converted or a counting direction is formed. As a result, high minuteness can be performed.

    5.
    发明专利
    未知

    公开(公告)号：DE69607838D1

    公开(公告)日：2000-05-25

    申请号：DE69607838

    申请日：1996-08-01

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAIOCCHI GIUSEPPE ,  VITI MARCO

    IPC: H02P6/182 ,  H02P6/34 ,  H02P8/34 ,  H02P6/00 ,  H02P6/18

    Abstract: The sensing of BEFM signals in the motor's windings for synchronizing the phase switchings, in driving a brushless and sensorless motor with predefined constant voltage or current values or predefined voltage or current profiles stored permanently in a memory, is greatly simplified through a reconstruction technique that avails itself of the knowledge of the predefined drive values. The sensing does not require access to the center star point and is performed by sensing either the voltage difference between the terminals of two windings or of the current flowing in two windings, depending on whether a current or voltage mode is employed.

    6.
    发明专利
    未知

    公开(公告)号：ITUB20153268A1

    公开(公告)日：2017-02-27

    申请号：ITUB20153268

    申请日：2015-08-27

    Applicant: ST MICROELECTRONICS SRL

    Inventor： SCORRANO MATTEO ,  MAIOCCHI GIUSEPPE

    IPC: H03K7/08 ,  H02M7/53 ,  H02M7/5387 ,  H03K17/66

    Abstract: A control unit is for a bridge circuit. The control unit may include a signal generator configured to generate first and second periodic drive signals for the bridge circuit, and determine a switch-on duration of the first and second periodic drive signals based upon a first digital data value having a first resolution. The control unit may include a controller configured to receive a second digital data value having a second resolution. The second resolution may be greater than the first resolution. The controller may be configured to generate the first digital data value so that, over periods of the first and second periodic drive signals, the first digital data value corresponds to an average of the second digital data value.

    7.
    发明专利
    未知

    公开(公告)号：AT532269T

    公开(公告)日：2011-11-15

    申请号：AT09180404

    申请日：2009-12-22

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAIOCCHI GIUSEPPE

    IPC: H03M1/08 ,  G05F3/16 ,  G06F1/025 ,  H03F3/217 ,  H03M1/82 ,  H03M3/02

    Abstract: A control apparatus for a supply device (5) of a load (2), the supply device is of switching type and is connected between a supply voltage (Vdd) and a reference voltage (GND). The apparatus comprises a sigma-delta device (10) having an input terminal at which is present a first digital signal (SDin), and being capable of providing a pulse-density modulation signal (Sdout) at the output terminal; the sigma-delta device comprises a feedback circuit (11) capable of sending to the input terminal (IN) of the sigma-delta device (10) a second digital signal (SDfb) whose value depends on the value of the output signal (SDout), and the apparatus comprises means (20) capable of digitalizing said supply voltage and of providing a further digital signal (Sg). The feedback circuit (16) comprises a terminal (Ext) capable of receiving the further digital signal (Sg), and the sigma-delta device has a gain (G) such that the output digital signal (Sdout) is proportional to the inverse of said further digital signal (Sg). ( Fig. 2 )

    8.
    发明专利
    未知

    公开(公告)号：DE60037306D1

    公开(公告)日：2008-01-17

    申请号：DE60037306

    申请日：2000-03-23

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAIOCCHI GIUSEPPE

    IPC: G11B19/20 ,  G11B5/54 ,  G11B5/56 ,  G11B19/28 ,  G11B21/02

    Abstract: A combo device for driving and controlling a rotation motor and a voice coil motor of a disk mass storage drive comprises a digital signal processor carrying out a plurality of functions, a memory, a bank of input/output registers, memory address decoding circuits, a circuit controlling and driving a multiphase motor that rotates the disk, a timing block, an output stage driving a "voice coil" motor for positioning a swinging arm carrying at least a read/write head, controlled in switched mode by a generator (PSM GENERATOR) of two control phases of variable duty-cycle, a duty-cycle control loop comprising a current sensing circuit and a control loop of the position of said arm comprising a speed detection circuit. The two control loops are digitally implemented by the digital signal processor (DSP) in function of digital data representing the current flowing in the winding of the "voice coil" motor and of the instant speed of said "voice-coil" motor generated by the speed detection circuit.

    9.
    发明专利
    未知

    公开(公告)号：DE69605019D1

    公开(公告)日：1999-12-09

    申请号：DE69605019

    申请日：1996-03-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAIOCCHI GIUSEPPE

    IPC: H02P6/10 ,  H02P6/34 ,  H02P23/00 ,  H03B28/00 ,  H03L7/06

    Abstract: The torque characteristic of an electrically driven brushless motor may be optimized by driving the phase windings of the motor with predefined, digitized and stored current or voltage profiles. Appropriate sequences of digital samples of the predefined driving profile are sequentially read from a nonvolatile memory where they are permanently stored to drive, through a DAC, the relative winding of the motor in synchronism with a signal representative of the rotor position.

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