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    ERROR AMPLIFIER WITH HIGH IN-PHASE QUANTITY REMOVAL
    1.
    发明专利
    ERROR AMPLIFIER WITH HIGH IN-PHASE QUANTITY REMOVAL 失效

    公开(公告)号：JP2000059156A

    公开(公告)日：2000-02-25

    申请号：JP14387299

    申请日：1999-05-24

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MILANESI ANDREA ,  POLETTO VANNI

    IPC: H03F3/45

    Abstract: PROBLEM TO BE SOLVED: To improve in-phase quantity removal by securing negative feedback in either of cases of application of a feedback signal to the uninverted and inverted input terminals of an operational amplifier by providing feedback for the operational amplifier and applying the feedback signal to the uninverted or inverted input terminal of the operational amplifier depending upon the sign of a different that a comparator detects. SOLUTION: The signal that is outputted by a zero-crossing comparator COMP and indicates the sign of the difference Va-Vb from an input signal determines whether or not the output signal of the operational amplifier OP is inverted through a stage ±1 and also controls a switch A to selects one of the inverted '-' or uninverted '+' input node, to which a feedback current forced by a 2nd bipolar junction PNP transistor 1 of a current mirror is impressed. Consequently, the consistency of the sign of the signal and the invariably negative feedback of the operational amplifier OP are secured in either state. The in-phase gain is substantially zero.

    BI-DIRECTIONAL ELECTRONIC SWITCH
    2.
    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.

    4.
    发明专利
    未知

    公开(公告)号：ITMI992249A1

    公开(公告)日：2001-04-28

    申请号：ITMI992249

    申请日：1999-10-28

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MILANESI ANDREA

    IPC: H03K5/22 ,  H03L20060101

    Abstract: Non linear circuit for open load control in Low-Side Driver type circuits, including at least two power transistors, scaled according to an area ratio 1 to M, with M>1, wherein the power transistor having the smaller area is controlled by a circuit input signal while the transistor having the larger area is controlled by an output value of an AND type logic gate, managed by a control circuit, that is regulated by the output value of a voltage sensor, placed in parallel with the power transistor having the larger area, and by the output value of a current sensor, placed in series with the power transistor having the smaller area, so that, when a current flowing in the power transistor having the smaller area is less than a predetermined value of the threshold current, the control circuit signals the open load on an output pin.

    5.
    发明专利
    未知

    公开(公告)号：DE69905238T2

    公开(公告)日：2003-06-26

    申请号：DE69905238

    申请日：1999-05-13

    Applicant: ST MICROELECTRONICS SRL ,  MAGNETI MARELLI POWERTRAIN SPA

    Inventor： MILANESI ANDREA ,  CHICCA STEFANIA ,  POLETTO VANNI ,  GIORGETTA VALERIO ,  SGATTI STEFANO ,  VIGNA SERGIO

    IPC: G01R31/02

    Abstract: A system is described for the diagnosis of a driver (D) of the type adapted to detect one or more circuit anomalies which can occur in the said driver, including: voltage comparator circuits (10, 20) adapted to generate diagnostic logic signals (F1, F2, F3) each indicative of the existence of a corresponding type of anomaly; and a coding circuit (M, SM) adapted to receive these diagnostic signals (F1, F2, F3) and to output information relating to an overall operating state of the circuit. The coding circuit (M, SM) includes a first portion adapted to provide at its output first logic signals (SHB, SHG, OL) indicative of the last anomaly occurred since a system reset operation, and a second portion for coding such first logic signals (SHB, SHG, OL). The second portion includes a sequential logic network (SM) adapted to: receive the first logic input signals (SHB, SHG, OL) and at least one second logic signal (IN) indicative of the current operating phase of the driver (D); and achieve, as a function of the said first and second logic signals (SHB, SHG, OL; IN) a stable internal state such as to determine at the output information in the form of an N bit coded word representative of an occurred anomaly, of a condition of absence of anomaly in the current operating phase, or of a condition of absence of anomaly in any operating phase.

    6.
    发明专利
    未知

    公开(公告)号：IT1313875B1

    公开(公告)日：2002-09-24

    申请号：ITMI992374

    申请日：1999-11-15

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MILANESI ANDREA ,  POLETTO VANNI ,  GHIGINI PAOLO

    IPC: G05D23/24

    Abstract: A temperature control system and method for integrated circuits, particularly those having a plurality of channels or power devices. The temperature control system for an integrated circuit includes at least a heat generating device; a sensor element providing a signal correlated to the working conditions of said the heat generating device such as a signal proportional to the dissipated power of the heat generating device; an elaboration circuit of the signal correlated to the working conditions of the heat generating device; and a turning off circuit of said at least a heat generating device responsively to a signal of said elaboration circuit.

    10.
    发明专利
    未知

    公开(公告)号：IT1313832B1

    公开(公告)日：2002-09-23

    申请号：ITMI992249

    申请日：1999-10-28

    Applicant: ST MICROELECTRONICS SRL

    Inventor： MILANESI ANDREA

    IPC: H03K5/22 ,  H03L20060101

    Abstract: Non linear circuit for open load control in Low-Side Driver type circuits, including at least two power transistors, scaled according to an area ratio 1 to M, with M>1, wherein the power transistor having the smaller area is controlled by a circuit input signal while the transistor having the larger area is controlled by an output value of an AND type logic gate, managed by a control circuit, that is regulated by the output value of a voltage sensor, placed in parallel with the power transistor having the larger area, and by the output value of a current sensor, placed in series with the power transistor having the smaller area, so that, when a current flowing in the power transistor having the smaller area is less than a predetermined value of the threshold current, the control circuit signals the open load on an output pin.

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