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公开(公告)号：IT1236627B
公开(公告)日：1993-03-25
申请号：IT2210489
申请日：1989-10-24
Applicant: ST MICROELECTRONICS SRL
Inventor： PALARA SERGIO , PAPARO MARIO , PELLICANO' ROBERTO
Abstract: The limiting circuit comprises a comparator (B), which makes the comparison between the output voltage (Vc) of the power device (T5, T6) and a predetermined reference voltage (Vrif). In the case wherein the output voltage (Vc) is just below the reference voltage (Vrif) the comparator (B) supplies a current to the load (L) suitable for preventing the output voltage from falling further below said reference voltage (Vrif).
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公开(公告)号：DE69633004D1
公开(公告)日：2004-09-02
申请号：DE69633004
申请日：1996-05-31
Applicant: ST MICROELECTRONICS SRL
Inventor： PALARA SERGIO
IPC: H01L21/331 , H01L29/73 , H01L29/732
Abstract: A vertical structure, integrated bipolar transistor incorporating a current sensing resistor, comprises a collector region (1), a base region (3) overlying the collector region, and an emitter region over the base region. The emitter region comprises a buried region (5), a surface region (7), and a first vertical diffusion region (6) connecting the buried layer (5) to the surface region (7). A second vertical diffusion region (8) connects the buried emitter layer (5) periphery to a first surface contact (11), while the surface emitter region (7) is contacted, along three peripheral sides thereof, by a second surface contact (10). The transistor current flows from the substrate (1), through the base (3) to the buried emitter region (5). It is then conveyed into the vertical region (6), which represents a resistive path (R1), and on reaching the surface region (7) splits between two resistive paths (R2) included between the vertical region (6) and the surface contacts (10). These resistive paths form in combination the current sensing resistor incorporated to the transistor, whose terminals are led to the first (11) and second (10) surface contacts, respectively.
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公开(公告)号：DE69527702T2
公开(公告)日：2002-12-05
申请号：DE69527702
申请日：1995-04-28
Applicant: ST MICROELECTRONICS SRL , DAIMLER CHRYSLER CORP
Inventor： PALARA SERGIO , DI CICCO BEN
Abstract: The invention concerns a method of detecting a spark produced by means of a spark coil (L) having a primary circuit (L') connected to a supply voltage generator (Vb) and a secondary circuit (L'') with the spark coil (L) being inserted in an electronic ignition device of an internal combustion motor. The method consists of the following phases: generation of a voltage signal (U) proportional to a voltage (VL) present on the primary circuit of the spark coil (L), comparison of the voltage signal (U) with a first, upper, threshold value (U1) by means of a comparator (C) with hysteresis, comparison by means of said comparator (C) of the voltage signal (U) with a second, lower, threshold value (U2) proportional to the supply voltage (Vb), detection of the duration of a voltage (Vc) output from the comparator (C), and signalling of the presence of the spark if said duration is greater than a reference value (B).
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公开(公告)号：DE69523908T2
公开(公告)日：2002-07-25
申请号：DE69523908
申请日：1995-07-31
Applicant: ST MICROELECTRONICS SRL , CONS RIC MICROELETTRONICA
Inventor： PALARA SERGIO , GRAZIANO VITO
IPC: H03K17/0412 , H03K17/30 , H05B41/282 , H05B41/00 , H03K17/687 , H02M7/5383
Abstract: A first principle on which the driver circuit of this invention operates is to delay the turning on of the MOS transistor (M2) by utilizing the time-wise pattern of the circuit input (G) signal rather than generating a delay within the circuit itself. The basic idea is one of using a threshold type of circuit element and arranging for no current to flow toward or from, depending on the type of the MOS transistor, the control terminal before the voltage at the circuit input exceeds a predetermined value. This is achieved, for example, by coupling a Zener diode (D1) serially to the control terminal. Where the input signal is of a kind which increases with a degree of uniformity, the time required to exceed that threshold will correspond to the desired delay. Thus, the driver circuit can match the dynamic range of the input signal automatically.
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公开(公告)号：DE69523908D1
公开(公告)日：2001-12-20
申请号：DE69523908
申请日：1995-07-31
Applicant: ST MICROELECTRONICS SRL , CONS RIC MICROELETTRONICA
Inventor： PALARA SERGIO , GRAZIANO VITO
IPC: H03K17/0412 , H03K17/30 , H05B41/282 , H05B41/00 , H03K17/687 , H02M7/5383
Abstract: A first principle on which the driver circuit of this invention operates is to delay the turning on of the MOS transistor (M2) by utilizing the time-wise pattern of the circuit input (G) signal rather than generating a delay within the circuit itself. The basic idea is one of using a threshold type of circuit element and arranging for no current to flow toward or from, depending on the type of the MOS transistor, the control terminal before the voltage at the circuit input exceeds a predetermined value. This is achieved, for example, by coupling a Zener diode (D1) serially to the control terminal. Where the input signal is of a kind which increases with a degree of uniformity, the time required to exceed that threshold will correspond to the desired delay. Thus, the driver circuit can match the dynamic range of the input signal automatically.
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Patent Agency Ranking
公开(公告)号：DE69032552D1
公开(公告)日：1998-09-17
申请号：DE69032552
申请日：1990-10-18
Applicant: ST MICROELECTRONICS SRL
Inventor： PALARA SERGIO , PAPARO MARIO , PELLICANO' ROBERTO
Abstract: The limiting circuit comprises a comparator (B), which makes the comparison between the output voltage (Vc) of the power device (T5, T6) and a predetermined reference voltage (Vrif). In the case wherein the output voltage (Vc) is just below the reference voltage (Vrif) the comparator (B) supplies a current to the load (L) suitable for preventing the output voltage from falling further below said reference voltage (Vrif).
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公开(公告)号：DE69316627D1
公开(公告)日：1998-02-26
申请号：DE69316627
申请日：1993-11-29
Applicant: ST MICROELECTRONICS SRL , CONS RIC MICROELETTRONICA
Inventor： PALARA SERGIO , SUERI STEFANO
Abstract: A diagnostic signal, indicative of the reaching of a predefined level, lower than a fixed maximum limit value, by the current flowing through a power transistor, is generated while employing a single comparator of a reference voltage with the voltage present across a sensing resistance, thus preventing problems arising from different offset characteristics of distinct comparators. By the use of current mirrors, the generation of a diagnostic signal when the current reaches a level that can be fixed very close to the limiting value, may be reliably triggered, irrespectively of the offset characteristic of the single comparator employed.
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公开(公告)号：DE69633004T2
公开(公告)日：2004-11-25
申请号：DE69633004
申请日：1996-05-31
Applicant: ST MICROELECTRONICS SRL
Inventor： PALARA SERGIO
IPC: H01L21/331 , H01L29/73 , H01L29/732
Abstract: A vertical structure, integrated bipolar transistor incorporating a current sensing resistor, comprises a collector region (1), a base region (3) overlying the collector region, and an emitter region over the base region. The emitter region comprises a buried region (5), a surface region (7), and a first vertical diffusion region (6) connecting the buried layer (5) to the surface region (7). A second vertical diffusion region (8) connects the buried emitter layer (5) periphery to a first surface contact (11), while the surface emitter region (7) is contacted, along three peripheral sides thereof, by a second surface contact (10). The transistor current flows from the substrate (1), through the base (3) to the buried emitter region (5). It is then conveyed into the vertical region (6), which represents a resistive path (R1), and on reaching the surface region (7) splits between two resistive paths (R2) included between the vertical region (6) and the surface contacts (10). These resistive paths form in combination the current sensing resistor incorporated to the transistor, whose terminals are led to the first (11) and second (10) surface contacts, respectively.
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公开(公告)号：DE69527702D1
公开(公告)日：2002-09-12
申请号：DE69527702
申请日：1995-04-28
Applicant: ST MICROELECTRONICS SRL , DAIMLER CHRYSLER CORP
Inventor： PALARA SERGIO , DI CICCO BEN
Abstract: The invention concerns a method of detecting a spark produced by means of a spark coil (L) having a primary circuit (L') connected to a supply voltage generator (Vb) and a secondary circuit (L'') with the spark coil (L) being inserted in an electronic ignition device of an internal combustion motor. The method consists of the following phases: generation of a voltage signal (U) proportional to a voltage (VL) present on the primary circuit of the spark coil (L), comparison of the voltage signal (U) with a first, upper, threshold value (U1) by means of a comparator (C) with hysteresis, comparison by means of said comparator (C) of the voltage signal (U) with a second, lower, threshold value (U2) proportional to the supply voltage (Vb), detection of the duration of a voltage (Vc) output from the comparator (C), and signalling of the presence of the spark if said duration is greater than a reference value (B).
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公开(公告)号：DE69527201D1
公开(公告)日：2002-08-01
申请号：DE69527201
申请日：1995-07-31
Applicant: ST MICROELECTRONICS SRL
Inventor： PALARA SERGIO
IPC: F02P3/055 , H03K17/082 , H03K17/00 , F02P3/04
Abstract: A voltage limiting circuit having a first and a second terminal between which is applied a voltage (Vs) to be limited of the type comprising at least one transistor (T2) having a first terminal connected to the first terminal of the circuit 1. This transistor T2 also comprises a second terminal kept at a reference voltage (E) and a control terminal coupled to the second terminal of the circuit 1 through at least one first equivalent resistive element (R'). The value of the equivalent resistive element (R') depends on the value of the voltage (Vs) to be limited so that the first transistor (T2) will have a temperature-stable breakdown voltage (Vcer).
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