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    14.
    发明专利
    未知

    公开(公告)号：DE69929033T2

    公开(公告)日：2006-08-24

    申请号：DE69929033

    申请日：1999-04-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PAPPALARDO SALVATORE ,  PULVIRENTI FRANCESCO ,  MARINO FILIPPO

    IPC: H02M3/156 ,  H02J7/00

    Abstract: The DC-DC converter (1') comprises a current error amplifier (32') and a voltage error amplifier (42') connected in parallel to control the charging of the battery (18) and a gradual turning off circuit (44', 60) for turning off gradually the current error amplifier (32') in a battery charging end phase. In this way, the DC-DC converter is able to supply to the battery (18) a battery charging current that remains constant up until the battery full charge voltage is reached.

    16.
    发明专利
    未知

    公开(公告)号：DE69732699D1

    公开(公告)日：2005-04-14

    申请号：DE69732699

    申请日：1997-08-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CAPICI SALVATORE VINCENZO ,  MILAZZO PATRIZIA ,  PULVIRENTI FRANCESCO

    IPC: G05F1/565

    Abstract: A linear type of voltage regulator, having an input terminal (VBAT) adapted to receive a supply voltage thereon, and an output terminal (VOUT) adapted to deliver a regulated output voltage, comprises a power transistor (M1) and a driving circuit therefor; the driving circuit basically comprises an operational amplifier (OP) having a differential input stage biased by a bias current (Iop) which varies proportionally with the output current (Iload) of the regulator.

    17.
    发明专利
    未知

    公开(公告)号：DE69811674D1

    公开(公告)日：2003-04-03

    申请号：DE69811674

    申请日：1998-11-09

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PULVIRENTI FRANCESCO ,  BONTEMPO GREGORIO ,  PALUMBO GAETANO

    IPC: H04B3/54 ,  H02J13/00

    Abstract: A circuit for detecting signals present on a bifilar voltage-supply and signal-transmission line, in which the signals are constituted by positive and negative variations of the supply potential of at least one of the wires of the line (2), comprises: a low-pass filter (20) connected to the two wires of the line in order to supply, at an output terminal of the filter, a constant reference potential (V+) substantially equal to the supply potential of a preselected one of the two wires, a first threshold comparator (21) having a reference input terminal (27) and a threshold input terminal (29) connected, respectively, to the output terminal (18) of the filter (20) and to the preselected wire of the two wires, and a second threshold comparator (22) having a reference input terminal (28) and a threshold input terminal (30) connected, respectively, to the preselected wire of the two wires and to the output terminal (18) of the filter (20). The circuit is relatively simple, does not require synchronization signals, and can be formed as an integrated circuit, taking up a limited area.

    18.
    发明专利
    未知

    公开(公告)号：IT1313833B1

    公开(公告)日：2002-09-23

    申请号：ITMI992250

    申请日：1999-10-28

    Applicant: ST MICROELECTRONICS SRL

    Inventor： RIBELLINO CALOGERO ,  MILAZZO PATRIZIA ,  PULVIRENTI FRANCESCO

    IPC: H02J7/00

    Abstract: A control circuit for controlling current of batteries at the end of the charging phase, especially for lithium batteries, including an input/output circuit, placed between a battery charger and a battery, and an output stage, including two transistors, wherein the resistance of one of the two transistors is modulated to increase the value of the total resistance and to cause a lower turning off current of said output stage.

    20.
    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.

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