中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

39 records (took 0.022 seconds)

    LOOP-TYPE VOLTAGE REGULATING DEVICE, AND METHOD OF REGULATING LOOP OF VOLTAGE
    1.
    发明专利
    LOOP-TYPE VOLTAGE REGULATING DEVICE, AND METHOD OF REGULATING LOOP OF VOLTAGE 失效

    公开(公告)号：JP2002027682A

    公开(公告)日：2002-01-25

    申请号：JP2000382392

    申请日：2000-12-15

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MAGGIONI GIAMPIETRO ,  GALLINARI MAURIZIO ,  SERRATONI CLAUDIO ,  MORELLI MARCO

    IPC: H02J7/16 ,  B60R16/02 ,  B60R16/03 ,  H02J7/14 ,  H02J7/24 ,  H02P9/04 ,  H02P9/14 ,  H02P9/30

    Abstract: PROBLEM TO BE SOLVED: To provide a loop-type voltage regulating device for regulating the voltage, especially of an automatic electrical system. SOLUTION: This device is of such a type, that it includes at least one heat engine (15), a voltage regulator (13), and a synchronous generator (11) capable of operating to provide the regulated voltage signal (A+) of the system and to receive a regulation signal (DF) from the voltage regulator (13), for a loop- type voltage regulating device for regulation of the voltage, especially of an automatic electrical system. This voltage regulating device advantageously includes further a control unit (14) within a regulation loop, and the unit is connected between the heat engine (15) and the voltage regulator (13), and also it is applied to supply the latter (the voltage regulator) with a signal related to engine operation.

    INTEGRATED AMPLIFIER
    2.
    发明专利
    INTEGRATED AMPLIFIER 失效

    公开(公告)号：JPH05206757A

    公开(公告)日：1993-08-13

    申请号：JP20110692

    申请日：1992-07-28

    Applicant: ST MICROELECTRONICS SRL ,  MARELLI AUTRONICA

    Inventor： MAZZUCCO MICHELANGELO ,  POLETTO VANNI ,  MORELLI MARCO

    IPC: G01N27/409 ,  H03F3/45

    Abstract: PURPOSE: To obtain a high common mode and the high suppression rate of a power source by keeping the collectors transistors at reference voltages, reflecting a current supplied from a prescribed circuit to a resistor leading an inter-emitter input signal at a resistor, and providing output signals from both terminals of this resistor. CONSTITUTION: The respective collectors of bipolar transistors (Q) 1 and 2 biased lower than 1μA by constant current sources IP3 and 4 are kept at respective fixed reference voltages VR1 and 2. Besides, an input signal Vin impressed between emitters 1N- and 1N+ of Q1 and Q2 is led to a resistor R1 and a current mirror circuit is composed of Q5, Q6, Q7, MOS transistors M7, M10 and M9, and resistors R3-R6. Therefore, a current IR1 to be supplied from this circuit to the resistor R1 is reflected to a resistor R6 and an output signal Vout is provided at both terminals. Thus, the input common mode, power source suppression ratio and input impedance are improved and the I/F circuit of optimum control unit for a vehicle can be obtained.

    H-SHAPED BRIDGE CIRCUIT HAVING PROTECTION AGAINST CROSSOVER PERIOD AT TIME OF INVERSION OF LOAD CURRENT
    3.
    发明专利
    H-SHAPED BRIDGE CIRCUIT HAVING PROTECTION AGAINST CROSSOVER PERIOD AT TIME OF INVERSION OF LOAD CURRENT 失效

    公开(公告)号：JPH05218837A

    公开(公告)日：1993-08-27

    申请号：JP24454892

    申请日：1992-09-14

    Applicant: ST MICROELECTRONICS SRL ,  MARELLI AUTRONICA

    Inventor： POLETTO VANNI ,  MORELLI MARCO ,  POMA ALBERTO

    IPC: H03K17/08 ,  H02M1/00 ,  H02M1/38 ,  H03K17/082 ,  H03K17/66

    Abstract: PURPOSE: To provide an H-shaped bridge circuit without drawblaks of prior technology by preventing it so that two electronic power switches connecting to a same output terminal are simultaneously conductive by a reliable method. CONSTITUTION: This bridge circuit is provided with 1st and 2nd electronic power switch pairs Q1, Q4 and Q2, Q3 that are connected between two output terminals OUT1, OUT2 for connection to terminals of a load L and two poles of DC power supplies Vs, so as to form an H-shaped structure including the load L, and with drive circuits C1, C2 that make the 1st electronic power switch (consisting of TRs Q1, Q4) or the 2nd electronic power switch (consisting of TRs Q2, Q3) selectively conductive, in order to supply a current in one direction or the reverse direction through the load L, and prevent it that the 1st and 2nd electronic power switch pairs Q1, Q4 and Q2, Q3 connected between the output terminals OUT1, OUT2, and the two poles of the power supplies Vs are simultaneously conductive.

    BI-DIRECTIONAL ELECTRONIC SWITCH
    4.
    发明专利
    BI-DIRECTIONAL ELECTRONIC SWITCH 失效

    公开(公告)号：JP2000058756A

    公开(公告)日：2000-02-25

    申请号：JP12036299

    申请日：1999-04-27

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MILANESI ANDREA ,  CHICCA STEFANIA ,  MORELLI MARCO ,  POLETTO VANNI

    IPC: H01L27/04 ,  H01L21/822 ,  H03K17/082

    Abstract: PROBLEM TO BE SOLVED: To totally remove a reverse-direction current and to minimize the bias current of a protection circuit by using an additional MOS transistor to switch off a second DMOS protection transistor during the period under 'below ground' condition. SOLUTION: A 'below ground' voltage condition, for example, of the integrated substrate of a device forming a diagnostic interface is detected by a comparator, which switches off a current generator I through a logic AND gate. At the same time, a current generator I2 which keeps an MOS transistor M at a high impedance state during the normal operation of a control unit is also switched off while a current generator I1 is switched on through an impedance to immediately decide switching-on of the MOS transistor M. Thus, a reverse- direction current flowing through a diagnostic output line VOUT is totally removed, while a bias current level is minimized.

    SATURATION CONTROL OF INTEGRATED BIPOLAR TRANSISTOR
    5.
    发明专利
    SATURATION CONTROL OF INTEGRATED BIPOLAR TRANSISTOR 失效

    公开(公告)号：JPH06236890A

    公开(公告)日：1994-08-23

    申请号：JP20718493

    申请日：1993-07-28

    Applicant: ST MICROELECTRONICS SRL

    Inventor： POLETTO VANNI ,  MORELLI MARCO

    IPC: H01L29/73 ,  G05F1/569 ,  H01L21/331 ,  H03K17/0422

    Abstract: PURPOSE: To provide a method for easily adjusting saturation, unrelated to the layout of a power transistor, unlike the known anti-saturation system, in which an actually generated substrate current is traced by the operation of the transistor in the saturation region, in place of tracing the generation of direct bias of collector/base junction for the power transistor as an index of saturation condition of the transistor. CONSTITUTION: A sensing resistor RS is connected in the path to limit a current IS, which is injected to a substrate from a saturation transistor T1 . A first signal, indicating saturation condition of the transistor, is detected and this signal is compared with a reference voltage VS. When the signal becomes higher than the threshold, a base current IB is reduced.

    7.
    发明专利
    未知

    公开(公告)号：DE69612282T2

    公开(公告)日：2001-08-23

    申请号：DE69612282

    申请日：1996-09-17

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： POLETTO VANNI ,  POMA ALBERTO ,  MORELLI MARCO

    IPC: G01F23/00 ,  H03K17/945

    Abstract: A circuit for controlling the reserve lamp (LAMP) of a vehicle's fuel level indicator instrument (STR). The circuit uses a switch (SW1) controlled by an extremely asymmetric clock signal (CLK) periodically to switch, for a very short time, the signal (Rj) provided by the level sensor (SENS) towards a comparator (CMP) operable to compare this signal (Rj) with a threshold value (Rth) for the purpose of determining the state of the reserve lamp (LAMP).

    8.
    发明专利
    未知

    公开(公告)号：ES2156989T3

    公开(公告)日：2001-08-01

    申请号：ES96830471

    申请日：1996-09-17

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： POLETTO VANNI ,  POMA ALBERTO ,  MORELLI MARCO

    IPC: G01F23/00 ,  H03K17/945

    Abstract: A circuit for controlling the reserve lamp (LAMP) of a vehicle's fuel level indicator instrument (STR). The circuit uses a switch (SW1) controlled by an extremely asymmetric clock signal (CLK) periodically to switch, for a very short time, the signal (Rj) provided by the level sensor (SENS) towards a comparator (CMP) operable to compare this signal (Rj) with a threshold value (Rth) for the purpose of determining the state of the reserve lamp (LAMP).

    9.
    发明专利
    未知

    公开(公告)号：DE69612282D1

    公开(公告)日：2001-05-03

    申请号：DE69612282

    申请日：1996-09-17

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： POLETTO VANNI ,  POMA ALBERTO ,  MORELLI MARCO

    IPC: G01F23/00 ,  H03K17/945

    Abstract: A circuit for controlling the reserve lamp (LAMP) of a vehicle's fuel level indicator instrument (STR). The circuit uses a switch (SW1) controlled by an extremely asymmetric clock signal (CLK) periodically to switch, for a very short time, the signal (Rj) provided by the level sensor (SENS) towards a comparator (CMP) operable to compare this signal (Rj) with a threshold value (Rth) for the purpose of determining the state of the reserve lamp (LAMP).

Patent Agency Ranking