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    VOLTAGE DOUBLER,VOLTAGE BOOSTER,AND VOLTAGE ADJUSTER
    1.
    发明专利
    VOLTAGE DOUBLER,VOLTAGE BOOSTER,AND VOLTAGE ADJUSTER 失效

    公开(公告)号：JPH08275506A

    公开(公告)日：1996-10-18

    申请号：JP20714595

    申请日：1995-08-14

    Applicant: CONS RIC MICROELETTRONICA ,  ST MICROELECTRONICS SRL

    Inventor： PULVIRENTI FRANCESCO ,  GARIBOLDI ROBERTO

    IPC: H02M3/07

    Abstract: PROBLEM TO BE SOLVED: To obtain two ways of use for enabling finding out the advantageous use of a charge pump MOS voltage booster and boosters of this type. SOLUTION: A voltage booster is equipped with four MOS transistors (M1, M2, M3, M4) in place of a classical diode showing an undesirable voltage drop and with an oscillator having two output terminals and two corresponding charge transfer capacitors, in place of a classical oscillator of a single output having relevant charge transfer capacitors. In this method, the undesirable voltage drop substantially does not exist, and ripples are reduced without making a circuit complicated.

    7.
    发明专利
    未知

    公开(公告)号：DE69421083T2

    公开(公告)日：2000-03-16

    申请号：DE69421083

    申请日：1994-11-17

    Applicant: ST MICROELECTRONICS SRL ,  CONS RIC MICROELETTRONICA

    Inventor： COLLETTI PAOLO ,  BONTEMPO GREGORIO ,  PULVIRENTI FRANCESCO ,  GARIBOLDI ROBERTO

    IPC: H01L27/04 ,  G05F1/573 ,  H01L21/822 ,  H01L29/78 ,  H02H7/00 ,  H03K17/08 ,  H02H9/02

    Abstract: The purpose of the present invention is to supply a method and a circuit simple and accurate enough to protect at least one transistor against exceeding a complex limit implying processing of multiple electrical quantities associated with said transistor. Since in many practical cases said complex limit corresponds to the product of at least two quantities, typically a current and a voltage, the circuit in accordance with the present invention generates electrical signals basically proportional to said quantities, multiplies them, compares the product with a reference signal corresponding to the limit placed on the transistor and acts on the transistor in such a way that said limit is not exceeded. Advantageously the multiplication of currents can be provided simply by means of connection in series of bipolar transistor junctions at which said currents are supplied to the respective emitters. In this case it is additionally advantageous to generate the reference signal by means of connection in series of the bipolar transistor junctions in such a manner as to have an analogous behaviour of the multiplier and the generator.

    8.
    发明专利
    未知

    公开(公告)号：DE69533308T2

    公开(公告)日：2004-11-25

    申请号：DE69533308

    申请日：1995-05-16

    Applicant: ST MICROELECTRONICS SRL ,  CONS RIC MICROELETTRONICA

    Inventor： PULVIRENTI FRANCESCO ,  GARIBOLDI ROBERTO

    IPC: G01R19/165 ,  G01R31/02 ,  G05B19/042 ,  G05B19/05

    Abstract: The invention relates to a method for detecting an open load by means of a driver having at least one main power transistor (M10) connected to the load (L) and one auxiliary transistor (M11) connected in parallel with the main transistor (M10) between a first power supply voltage reference (Vs) and a second voltage reference (GND), the method providing a comparison between a first voltage (VIN1) present on a terminal (S10) connected to the load of the main transistor (M10) and a second voltage (VIN2) present on a terminal (S11) of the auxiliary transistor (M11). The invention also relates to a circuit for detecting an open load (L), in which the said method is implemented.

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