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    Protection method for power transistors, and corresponding circuit
    4.
    发明公开
    Protection method for power transistors, and corresponding circuit 失效
    Verfahren zum Schutz von Leistungstransistoren undübereinstimmendeSchaltung

    公开(公告)号：EP0782235A1

    公开(公告)日：1997-07-02

    申请号：EP95830550.0

    申请日：1995-12-29

    申请人： SGS-THOMSON MICROELECTRONICS s.r.l. ,  CO.RI.M.ME. CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO

    发明人： Pulvirenti, Francesco ,  Bontempo, Gregorio ,  Gariboldi, Roberto

    IPC分类号： H02H1/00 ,  H03K17/082

    CPC分类号： H03K17/0822 ,  H03K2017/0806 ,  H03K2217/0063 ,  H03K2217/0072

    摘要： The present invention is aimed at providing a method and a circuit for protecting the output stage of a power actuator against voltage transients of the surge type. In particular, it provides protection against voltage surge transients of the kind described by International Standard IEC 801-5, for a power transistor contained in the output stage of the actuator.
    The method of this invention provides for:

    the utilization of the power transistor (PW) intrinsic diode (DP) for dumping the transient energy to one of the supply generator terminals during a positive transient; and
    the utilization of the power transistor (PW) restoration feature to the on state for dumping the energy thereinto during a negative transient, while simultaneously inhibiting the current limiting function.

    The power transistor (PW) is turned on again, and the current limiting circuit (4) inhibited, by the following steps:

    a) generating an electric signal which is substantially proportional to the voltage appearing at the output terminal (OUT) of the actuator;
    b) driving the control terminal (G) of the power transistor (PW) by means of said electric signal, and causing said transistor to conduct, while simultaneously disabling the current limiting circuit (4) when the output voltage exceeds a predetermined threshold; and
    c) allowing the transient energy to be dissipated to the power transistor (PW).

    摘要翻译： 本发明的目的在于提供一种用于保护功率执行器的输出级以防止浪涌型电压瞬变的方法和电路。 特别地，它提供了针对包含在执行器的输出级中的功率晶体管的国际标准IEC 801-5所述类型的电压浪涌瞬变的保护。 本发明的方法提供：功率晶体管（PW）本征二极管（DP）用于在正瞬变期间将瞬态能量倾倒到一个供电发生器端子; 以及在负瞬态期间将功率晶体管（PW）恢复特性应用于导通状态以将能量倾倒在其中，同时抑制电流限制功能。 功率晶体管（PW）再次导通，并且限流电路（4）通过以下步骤来禁止：a）产生基本上与致动器的输出端（OUT）处出现的电压成比例的电信号 ; b）通过所述电信号驱动功率晶体管（PW）的控制端（G），并使所述晶体管导通，同时当所述输出电压超过预定阈值时禁止所述限流电路（4）; 以及c）允许瞬态能量被耗散到功率晶体管（PW）。

    Overvoltage protection device for an integrated circuit and corresponding method
    5.
    发明公开
    Overvoltage protection device for an integrated circuit and corresponding method 失效
    Überlastschutzanordnungfüreine integrierte Schaltung und entsprechendes Verfahren

    公开(公告)号：EP0687066A1

    公开(公告)日：1995-12-13

    申请号：EP94830284.9

    申请日：1994-06-10

    申请人： CO.RI.M.ME. CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO

    发明人： Bontempo, Gregorio ,  Pulvirenti, Francesco ,  Colletti, Paolo ,  Gariboldi, Roberto

    IPC分类号： H03K17/082

    CPC分类号： H03K17/284 ,  H03K17/0822

    摘要： The invention relates to a non-dissipative device for protecting against overloading an integrated circuit having multiple independent channels, being of the type which comprises an input terminal (IN) and an output terminal (OUT) having an integrated switch (1) connected therebetween which consists of a first or input portion (2), a logic gate (PL1) with two inputs (I3,I4) a second or control portion (3), and a third or output portion (4), all in series with one another. The device further comprises a circuit (A) for generating the on- and off-times (Ton,Toff) of the integrated switch (1) connected between an output (O4) of the third portion (4) and an input terminal (I4) of said logic gate (PL1).

    摘要翻译： 本发明涉及一种非消散装置，用于防止具有多个独立通道的集成电路的过载，该集成电路具有包括输入端（IN）和输出端（OUT）的类型，该输出端（IN）和输出端（OUT）之间连接有集成开关（1） 由第一或输入部分（2），具有两个输入（I3，I4），第二或控制部分（3）的逻辑门（PL1），以及彼此串联的第三或输出部分（4） 。 该装置还包括用于产生连接在第三部分（4）的输出（O4）和输入端（I4）之间的集成开关（1）的开和关时间（Ton，Toff）的电路（A） ）的逻辑门（PL1）。

    Circuit with overload current protection for power transistors
    7.
    发明公开
    Circuit with overload current protection for power transistors 失效
    Schaltung mitÜberstromschützfürLeistungstransistoren

    公开(公告)号：EP0789458A1

    公开(公告)日：1997-08-13

    申请号：EP96830054.1

    申请日：1996-02-09

    申请人： CO.RI.M.ME. CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO

    发明人： Pulvirenti, Francesco ,  Bontempo, Gregorio

    IPC分类号： H03K17/082

    CPC分类号： H03K17/0822

    摘要： The purpose of the present invention is to protect the final transistor (PW) of a power actuator from short circuits and overloads with a completely integrated circuitry solution which would not influence the output impedance of the actuator and would permit having a limitation current constant and independent of the value of the output terminal of the actuator.
    A power actuator in accordance with the present invention incorporates a circuit for limitation of the maximum current delivered by the power transistor (PW) which comprises:

    a network for detection of the current delivered by the power transistor (PW) which generates a first electrical signal proportional to said current,
    a reference network generating a reference electrical signal, and
    an operational amplifier (3) which compares the first electrical signal with the reference electrical signal and which tends to inhibit the power transistor if the current delivered exceeds a certain threshold value and whose output terminal is coupled to the reference network in such a manner that the reference electrical signal depends on the voltage present at the amplifier output.

    摘要翻译： 本发明的目的是通过完全集成的电路解决方案来保护功率致动器的最终晶体管（PW）免于短路和过载，这不会影响致动器的输出阻抗，并且将允许具有限制电流恒定和独立 的执行器的输出端子的值。 根据本发明的功率致动器包括用于限制由功率晶体管（PW）传送的最大电流的电路，其包括：用于检测由功率晶体管（PW）传送的电流的网络，其生成第一电信号 与所述电流成比例，产生参考电信号的参考网络和运算放大器（3），其将第一电信号与参考电信号进行比较，并且如果输出的电流超过某一阈值则趋向于抑制功率晶体管;以及 其输出端子以参考电信号取决于存在于放大器输出端的电压的方式耦合到参考网络。

    Protection circuit and method for power transistors, voltage regulator using the same
    8.
    发明公开
    Protection circuit and method for power transistors, voltage regulator using the same 失效
    Schutzschaltung und VerfahrenfürLeistungstransistor sowie diese verwendender Spannungsregler

    公开(公告)号：EP0713163A1

    公开(公告)日：1996-05-22

    申请号：EP94830535.4

    申请日：1994-11-17

    申请人： CO.RI.M.ME. CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO ,  SGS-THOMSON MICROELECTRONICS S.r.l.

    发明人： Colletti, Paolo ,  Bontempo, Gregorio ,  Pulvirenti, Francesco ,  Gariboldi, Roberto

    IPC分类号： G05F1/573

    CPC分类号： G05F1/573

    摘要： The purpose of the present invention is to supply a method and a circuit simple and accurate enough to protect at least one transistor against exceeding a complex limit implying processing of multiple electrical quantities associated with said transistor.
    Since in many practical cases said complex limit corresponds to the product of at least two quantities, typically a current and a voltage, the circuit in accordance with the present invention generates electrical signals basically proportional to said quantities, multiplies them, compares the product with a reference signal corresponding to the limit placed on the transistor and acts on the transistor in such a way that said limit is not exceeded.
    Advantageously the multiplication of currents can be provided simply by means of connection in series of bipolar transistor junctions at which said currents are supplied to the respective emitters. In this case it is additionally advantageous to generate the reference signal by means of connection in series of the bipolar transistor junctions in such a manner as to have an analogous behaviour of the multiplier and the generator.

    摘要翻译： 本发明的目的是提供足够简单且准确的方法和电路，以保护至少一个晶体管免受超过复数限制，这意味着与所述晶体管相关联的多个电量的处理。 由于在许多实际情况下，所述复数极限对应于至少两个量（通常为电流和电压）的乘积，所以根据本发明的电路产生与所述量基本成比例的电信号，将其乘以它们，将产品与 参考信号对应于放置在晶体管上的极限，并以不超过所述极限的方式作用在晶体管上。 有利地，电流的乘法可以简单地通过串联双极晶体管结的连接来提供，在该点处，所述电流被提供给相应的发射极。 在这种情况下，另外有利的是通过串联双极晶体管结的连接来产生参考信号，使得具有乘法器和发生器的类似行为。

    High-efficiency regulated voltage-boosting device
    9.
    发明公开
    High-efficiency regulated voltage-boosting device 审中-公开
    Hocheffiziente regulierteSpannungserhöhungsvorrichtung

    公开(公告)号：EP1298777A1

    公开(公告)日：2003-04-02

    申请号：EP01830613.4

    申请日：2001-09-28

    申请人： STMicroelectronics S.r.l.

    发明人： Pulvirenti, Francesco ,  Bontempo, Gregorio

    IPC分类号： H02M3/07 ,  G09G3/36

    CPC分类号： H02M3/073 ,  G09G3/36 ,  G09G3/3696 ,  G09G2330/02 ,  G09G2330/021 ,  H02M2001/0022 ,  Y10T307/747

    摘要： A regulated voltage-boosting device including a charge-pump circuit (11), which has an input terminal (4a) receiving a first voltage (V DD ) and an output terminal (4b) supplying a second voltage (V LCD ) higher than said first voltage (V DD ), and being provided with a plurality of voltage-boosting stages (17) that can be selectively activated and deactivated. The regulated voltage-boosting device moreover comprises an automatic-selection circuit (10) for activating a number of voltage-boosting stages (17) which is correlated to the first voltage (V DD ) and to the second voltage (V LCD ).

    摘要翻译： 一种包括电荷泵电路（11）的稳压升压装置，其具有接收第一电压（VDD）的输入端（4a）和提供高于所述第一电压（VDD）的第二电压（VLCD）的输出端（4b） （VDD），并且设置有可以选择性地激活和去激活的多个升压级（17）。 调节升压装置还包括用于激活与第一电压（VDD）和第二电压（VLCD）相关的多个升压级（17）的自动选择电路（10）。

    A circuit for detecting digital signals, particularly for a system with an ASI field bus
    10.
    发明公开
    A circuit for detecting digital signals, particularly for a system with an ASI field bus 有权
    Schaltung zur digitalen Signalerkennung insbesonderefürSystem mit ASI-Feldbus

    公开(公告)号：EP1001506A1

    公开(公告)日：2000-05-17

    申请号：EP98830672.6

    申请日：1998-11-09

    申请人： STMicroelectronics S.r.l.

    发明人： Pulvirenti, Francesco ,  Bontempo, Gregorio ,  Palumbo, Gaetano

    IPC分类号： H02J13/00

    CPC分类号： H02J13/0003

    摘要： A circuit for detecting signals present on a bifilar voltage-supply and signal-transmission line, in which the signals are constituted by positive and negative variations of the supply potential of at least one of the wires of the line (2), comprises: a low-pass filter (20) connected to the two wires of the line in order to supply, at an output terminal of the filter, a constant reference potential (V+) substantially equal to the supply potential of a preselected one of the two wires, a first threshold comparator (21) having a reference input terminal (27) and a threshold input terminal (29) connected, respectively, to the output terminal (18) of the filter (20) and to the preselected wire of the two wires, and a second threshold comparator (22) having a reference input terminal (28) and a threshold input terminal (30) connected, respectively, to the preselected wire of the two wires and to the output terminal (18) of the filter (20).
    The circuit is relatively simple, does not require synchronization signals, and can be formed as an integrated circuit, taking up a limited area.

    摘要翻译： 用于检测出现在双向电压和信号传输线上的信号的电路，其中信号由线（2）的至少一根电线的供电电位的正和负变化构成，包括： 低通滤波器（20）连接到线路的两条线，以便在滤波器的输出端处提供基本上等于两条线中预选的电源的电位的恒定参考电位（V +）， 具有参考输入端子（27）和阈值输入端子（29）的第一阈值比较器（21）分别连接到滤波器（20）的输出端子（18）和两根导线的预选导线， 以及具有参考输入端子（28）和阈值输入端子（30）的第二阈值比较器（22）分别连接到两根导线的预选导线和滤波器（20）的输出端子（18） 。 电路比较简单，不需要同步信号，可以形成集成电路，占用有限的区域。