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    44.
    发明专利
    未知

    公开(公告)号：DE60019255T2

    公开(公告)日：2006-03-09

    申请号：DE60019255

    申请日：2000-01-28

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PULVIRENTI FRANCESCO

    IPC: G01R31/317 ,  G11C17/18 ,  H01L21/66 ,  H03K17/693

    Abstract: The invention relates to a method and a circuit for carrying out a trimming operation on integrated circuits (2) having a trimming circuit portion (1) which includes memory elements (10) and a means (8) of modifying the state of said memory elements (10), at least a first input or supply pin (IN), an output pin (OUT), and a second supply pin (GND). The method comprises the following steps: enabling a single pin (OUT) to receive trimming data by biasing the pin to outside its operating range; to acquire such data, obtaining a clock signal from a division of the bias potential of the trimming pin (OUT); obtaining the logic value of the trimming data from a different division of the bias potential of said pin (OUT); enabling serial acquisition of the data according to the clock signal; and transferring the data to the means (8) of modifying the state of the memory elements (10). Advantageously, the data are also transferred into a selection logic (11), by-passing the means (8) for modifying the state of the memory elements (10), on the occurrence of a simulated trimming operation.

    45.
    发明专利
    未知

    公开(公告)号：DE69929033D1

    公开(公告)日：2006-01-26

    申请号：DE69929033

    申请日：1999-04-29

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PAPPALARDO SALVATORE ,  PULVIRENTI FRANCESCO ,  MARINO FILIPPO

    IPC: H02J7/00 ,  H02M3/156

    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.

    46.
    发明专利
    未知

    公开(公告)号：DE69921093T2

    公开(公告)日：2005-11-10

    申请号：DE69921093

    申请日：1999-05-10

    Applicant: ST MICROELECTRONICS SRL

    Inventor： D ARRIGO ANGELO ,  CAPICI SALVATORE ,  MARINO FILIPPO ,  PULVIRENTI FRANCESCO

    IPC: H02J7/00 ,  H02M3/156

    Abstract: The frequency translator (72) is usable in a switching DC-DC converter of the type operating as a voltage regulator and as a battery charger. The frequency translator (72) receives at inputs a division voltage (VFB) proportional to a present value of the output voltage (VOUT) of the DC-DC converter (70), a reference voltage (VREF) correlated to a nominal value of the output voltage (VOUT), and a limiting signal (VL) indicative of a normal operation or of current limitation operation of the DC-DC converter (70), and supplies at an output (72u) a bias current (IBIAS) which is supplied to an input of an oscillator (32) supplying at an output a comparison signal (VC) presenting a periodic pattern with a frequency which is correlated to the bias current (IBIAS). In particular, the frequency translator (72) operates in a way such as to regulate a frequency translation of the comparison signal (VC) as a function of the difference between the division voltage (VFB) and the reference voltage (VREF) only when the DC-DC converter (70) is operating in the current limitation condition.

    47.
    发明专利
    未知

    公开(公告)号：DE69728134T2

    公开(公告)日：2004-10-14

    申请号：DE69728134

    申请日：1997-05-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PULVIRENTI FRANCESCO ,  MILAZZO PATRIZIA

    IPC: H02J7/00 ,  H03K4/00 ,  H03K17/16 ,  H02J7/10

    Abstract: A battery-charging electronic device comprises a current generator (2) adapted to supply a charging current to a battery (3) and a controlled current edge switch having a circuit (1) for controlling the switching edges of current (IO) being flowed through a power transistor (PW). The switching edge control circuit (1) comprises: a controlled edge variable voltage generator for generating a controlled edge voltage signal (VA); a voltage/current converter (11) for converting the voltage signal (VA) to a controlled edge current signal (IR); a driver circuit (12) for the power transistor (PW) being input the controlled edge current signal (IR) to mirror, onto the power transistor (PW), an output current (IO) which is proportional to the controlled edge current signal (IR).

    49.
    发明专利
    未知

    公开(公告)号：DE69728134D1

    公开(公告)日：2004-04-22

    申请号：DE69728134

    申请日：1997-05-30

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PULVIRENTI FRANCESCO ,  MILAZZO PATRIZIA

    IPC: H02J7/00 ,  H03K4/00 ,  H03K17/16 ,  H02J7/10

    Abstract: A battery-charging electronic device comprises a current generator (2) adapted to supply a charging current to a battery (3) and a controlled current edge switch having a circuit (1) for controlling the switching edges of current (IO) being flowed through a power transistor (PW). The switching edge control circuit (1) comprises: a controlled edge variable voltage generator for generating a controlled edge voltage signal (VA); a voltage/current converter (11) for converting the voltage signal (VA) to a controlled edge current signal (IR); a driver circuit (12) for the power transistor (PW) being input the controlled edge current signal (IR) to mirror, onto the power transistor (PW), an output current (IO) which is proportional to the controlled edge current signal (IR).

    50.
    发明专利
    未知

    公开(公告)号：ITMI20021424A1

    公开(公告)日：2003-12-29

    申请号：ITMI20021424

    申请日：2002-06-27

    Applicant: ST MICROELECTRONICS SRL ,  DORA SPA

    Inventor： PULVIRENTI FRANCESCO ,  SALA LEONARDO ,  PRIVITERA SALVATORE ,  PAPPALARDO SALVATORE

    IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

    Abstract: A system for driving columns of a liquid crystal display includes logic circuitry operating in a supply path between a first and a second supply voltage in which the first supply voltage is higher than the second supply voltage. The logic circuitry is capable of generating first logic signals and second logic signals whose value is equal to the first or second supply voltage. The system includes two level shifters coupled to the logic circuitry and operating in a supply path between a third supply voltage greater than the first supply voltage and the second supply voltage; the level shifters are capable of raising the value of the second logic signals. The system also includes a first and a second pair of transistors having different supply paths and having an output terminal in common; the first and the second pair of transistors are coupled to the level shifters to determine the drive signal of a column. The system includes turnoff circuitry operating in a supply path between the third and the second supply voltage and coupled to the two level shifters. The turnoff circuitry is capable of keeping one of the two pairs of transistors in a turnoff state in the period of time of a frame when the other of the two pairs of transistors is operative.

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