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    1.
    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).

    2.
    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).

    4.
    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).

    7.
    发明专利
    未知

    公开(公告)号：ES2120974T3

    公开(公告)日：1998-11-16

    申请号：ES92112639

    申请日：1992-07-23

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： MAZZUCCO MICHELANGELO ,  POLETTO VANNI ,  MORELLI MARCO

    IPC: G01N27/409 ,  H03F3/45

    Abstract: In order to achieve a high input dynamic range as well as high CMRR and PSRR values and input impedance with the use of a single supply voltage (Vcc), the amplifier includes an input stage with two transistors (Q1, Q2) which are biased by a constant current (IP3, IP4), preferably of less than 1 microampere, and the collectors of the transistors (Q1, Q2) are kept at fixed reference voltages (VR1, VR2). The input signal (VIN) applied between the emitters (IN(-), IN(+)) of the transistors (Q1, Q2) is transferred to the terminals of a first resistor (R1) which is supplied with current (IR1) from a circuit (M7, A5, R3; M10, Q6, R4; M9, Q7, R5) which mirrors the current (IR1) into a second resistor (R6), from the terminals of which the output signal (VOUT) is taken. The preferred application is for forming interfaces for lambda probes fitted to catalytic converters for motor vehicles.

    8.
    发明专利
    未知

    公开(公告)号：DE69226831T2

    公开(公告)日：1999-01-14

    申请号：DE69226831

    申请日：1992-07-23

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： MAZZUCCO MICHELANGELO ,  POLETTO VANNI ,  MORELLI MARCO

    IPC: G01N27/409 ,  H03F3/45

    Abstract: In order to achieve a high input dynamic range as well as high CMRR and PSRR values and input impedance with the use of a single supply voltage (Vcc), the amplifier includes an input stage with two transistors (Q1, Q2) which are biased by a constant current (IP3, IP4), preferably of less than 1 microampere, and the collectors of the transistors (Q1, Q2) are kept at fixed reference voltages (VR1, VR2). The input signal (VIN) applied between the emitters (IN(-), IN(+)) of the transistors (Q1, Q2) is transferred to the terminals of a first resistor (R1) which is supplied with current (IR1) from a circuit (M7, A5, R3; M10, Q6, R4; M9, Q7, R5) which mirrors the current (IR1) into a second resistor (R6), from the terminals of which the output signal (VOUT) is taken. The preferred application is for forming interfaces for lambda probes fitted to catalytic converters for motor vehicles.

    9.
    发明专利
    未知

    公开(公告)号：ES2122978T3

    公开(公告)日：1999-01-01

    申请号：ES92115700

    申请日：1992-09-14

    Applicant: ST MICROELECTRONICS SRL ,  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.

    10.
    发明专利
    未知

    公开(公告)号：DE69226831D1

    公开(公告)日：1998-10-08

    申请号：DE69226831

    申请日：1992-07-23

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI SPA

    Inventor： MAZZUCCO MICHELANGELO ,  POLETTO VANNI ,  MORELLI MARCO

    IPC: G01N27/409 ,  H03F3/45

    Abstract: In order to achieve a high input dynamic range as well as high CMRR and PSRR values and input impedance with the use of a single supply voltage (Vcc), the amplifier includes an input stage with two transistors (Q1, Q2) which are biased by a constant current (IP3, IP4), preferably of less than 1 microampere, and the collectors of the transistors (Q1, Q2) are kept at fixed reference voltages (VR1, VR2). The input signal (VIN) applied between the emitters (IN(-), IN(+)) of the transistors (Q1, Q2) is transferred to the terminals of a first resistor (R1) which is supplied with current (IR1) from a circuit (M7, A5, R3; M10, Q6, R4; M9, Q7, R5) which mirrors the current (IR1) into a second resistor (R6), from the terminals of which the output signal (VOUT) is taken. The preferred application is for forming interfaces for lambda probes fitted to catalytic converters for motor vehicles.

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