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    CIRCUIT FOR DIAGNOSING ELECTRICAL LOAD STATE
    11.
    发明专利
    CIRCUIT FOR DIAGNOSING ELECTRICAL LOAD STATE 失效

    公开(公告)号：JPH10104305A

    公开(公告)日：1998-04-24

    申请号：JP25032897

    申请日：1997-09-16

    Applicant: SGS THOMSON MICROELECTRONICS ,  MAGNETI MARELLI SPA

    Inventor： CRESPI ANGELO ,  CHICCA STEFANIA ,  MASTELLA PAOLO ,  POLETTO VANNI

    IPC: G01R15/14 ,  G01R19/00 ,  G01R19/165 ,  G01R31/00 ,  G01R31/02 ,  G01R31/28

    Abstract: PROBLEM TO BE SOLVED: To decrease the area occupied by a circuit by providing a transistor between the output and a voltage compactor means, decreasing the maximum voltage at a coupling point, and thereby reducing the number of high-voltage parts. SOLUTION: A transistor DMOS1 withstands high voltage, and a circuit connected to the downstream side is at low voltage. The transistor DMOS1 is the only one high-voltage part used. The gate terminal of the transistor DMOS1 is connected to a low supply voltage Vdd. When a voltage Vs at a coupling point S is larger than the voltage value Vs- max, the transistor DMOS1 is cut off. The voltage value Vs- max is imparted by the expression Vs- max= Vdd-Vth, where Vth is the threshold value of the transistor DMOS1. When the Vout of the output OUT is lower than the value, at which the low-voltage device can withstand, the intended measurement is performed at the coupling point S having the voltage equal to the voltage Vout. A low-voltage comparator CDT finds the voltage range at the coupling point S.

    13.
    发明专利
    未知

    公开(公告)号：DE69226746D1

    公开(公告)日：1998-10-01

    申请号：DE69226746

    申请日：1992-09-14

    Applicant: SGS THOMSON MICROELECTRONICS ,  MAGNETI MARELLI SPA

    Inventor： POLETTO VANNI ,  MORELLI MARCO ,  POMA ALBERTO

    IPC: H03K17/08 ,  H02M1/00 ,  H02M1/38 ,  H03K17/082 ,  H03K17/66 ,  H03K17/16

    Abstract: The circuit includes two output terminals (OUT1, OUT2) for connection to the terminals of a load (L), first and second pairs of electronic power switches (Q1, Q4; Q2, Q3) which are connected between the output terminals (OUT1, OUT2) and the two poles of a direct-current voltage supply (Vs) so as to form an H-shaped structure with the load (L), and a driver circuit (C1, C2) for selectively making the electronic power switches of the first pair (Q1, Q4) of the second pair (Q2, Q3) order to cause a current to flow through the load (L) in one direction or the other respectively, and for preventing the electronic switches (Q1, Q3; Q2, Q4) which are connected between the same output terminal (OUT1; OUT2) and the two poles of the voltage supply (Vs) from conducting simultaneously.

    15.
    发明专利
    未知

    公开(公告)号：DE69216882D1

    公开(公告)日：1997-03-06

    申请号：DE69216882

    申请日：1992-03-11

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： BRAMBILLA MASSIMILIANO ,  POLETTO VANNI

    IPC: G05F3/26 ,  G01R1/28 ,  G05F3/30 ,  G05F1/46 ,  G05F1/567

    Abstract: The generator of reference voltage comprises a first generator of current (1) suitable for generating a first current (I) that varies linearly with the supply voltage, a first generator of voltage (T10, T11, R4, R6, T6, T7, I3, T12) suitable for generating a constant first voltage (VBG) with zero thermal drift, a second generator of current (T10, T11, R4, R6, T6, T7, I3, T13, T14, T15, R5) suitable for generating a second current (I1) dependent on said voltage (VBG) with zero thermal drift, a second generator of voltage (T6, T7, T10, T11) suitable for generating a second voltage (DVBE) with given thermal drift, a third generator of current (T6, T7, T10, T11, T4, T5, T8, T9) suitable for generating a third current (I2) dependent on said voltage (DVBE) with given thermal drift and means (5) for combining said currents (I, I1, I2) together so as to produce across an output resistance (R7) an output voltage (Vout) having a value equal to the product of said output resistance (R7) by said first and third current (I, I2), divided by said second current (I1).

    16.
    发明专利
    未知

    公开(公告)号：DE69210651T2

    公开(公告)日：1997-01-16

    申请号：DE69210651

    申请日：1992-02-25

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI ,  MORELLI MARCO ,  MURARI BRUNO

    IPC: G05F1/56 ,  G05F1/569 ,  G05F1/59 ,  H02J9/06 ,  G05F1/595

    Abstract: A voltage regulator (30) comprising a first power switch (16) connected between the input terminal (11) and output terminal (13); a storage condenser (21) connected to the input terminal via a one-way switch (18); a second power switch (19) connected between the condenser and the input terminal; and a regulating element (17) connected to the output terminal and driving the power switches (16, 19) in such a manner as to maintain the output voltage (Vo) constant. For better distributing electric and thermal stress and improving the reliability and working life of the regulator by reducing the interference caused by switching of the two power switches, a drive device (31) is provided between the regulating element (17) and the switches (16, 19), for detecting the input voltage (VA) and the voltage of the condenser (VA'), and keeping both switches on as long as the input voltage is above two given thresholds (VTH1, VTH2), turning off the second switch (19) when the input voltage is higher than the condenser voltage (VA > VA') and below the first threshold (VA

    19.
    发明专利
    未知

    公开(公告)号：IT1244341B

    公开(公告)日：1994-07-08

    申请号：IT2247090

    申请日：1990-12-21

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI ,  BRAMBILLA MASSIMILIANO

    IPC: G05F3/26 ,  G05F1/46 ,  G05F3/30 ,  H02J

    Abstract: The generator comprises a first generator of voltage with thermal drift of zero, a second generator of voltage with given thermal drift, first means for applying a given load to the voltage generated by the first generator, second means for applying a given load to the voltage generated by the second generator, subtracting means for subtracting one from the other the loaded voltages generated by said first and second generator of voltage.

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