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    4.
    发明专利
    未知

    公开(公告)号：ITTO910707D0

    公开(公告)日：1991-09-18

    申请号：ITTO910707

    申请日：1991-09-18

    Applicant: ST MICROELECTRONICS SRL ,  MARELLI AUTRONICA ,  SGS THOMSON MICROELECTRONICS

    Inventor： POMA ALBERTO ,  POLETTO VANNI ,  MORELLI MARCO

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

    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.

    5.
    发明专利
    未知

    公开(公告)号：ITTO910599D0

    公开(公告)日：1991-07-29

    申请号：ITTO910599

    申请日：1991-07-29

    Applicant: ST MICROELECTRONICS SRL ,  MARELLI AUTRONICA ,  SGS THOMSON MICROELECTRONICS ,  MARELLI SUTRONICA S P A

    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.

    INTEGRATED AMPLIFIER
    9.
    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
    10.
    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.

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