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.

公开(公告)号：JPH0851349A

公开(公告)日：1996-02-20

申请号：JP6279295

申请日：1995-03-22

Applicant: ST MICROELECTRONICS SRL

Inventor： COLANDREA FRANCESCO ,  POLETTO VANNI

IPC: H03K17/08 ,  H03K17/082 ,  H03K17/567 ,  H03K17/687

Abstract: PURPOSE: To provide a protection circuit capable of quickly responding without interrupting a power stage even when rapid overloads are generated. CONSTITUTION: This circuit is supplied with a drive current ID provided with a control terminal G provided with a prescribed control potential and supplied with the drive current ID and provided with a low-speed adjustment loop 11 for measuring an electric amount relating to the drive current ID and generating current limiting signals I1 for adjusting the control potential. Further, it is provided with a high-speed adjustment loop 12 parallelly connected to the low- speed adjustment loop 11 for detecting the high-speed change of the drive current ID and generating fast control signals I2 for quickly reducing the control potential.

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.

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.

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.

公开(公告)号：JPH06236890A

公开(公告)日：1994-08-23

申请号：JP20718493

申请日：1993-07-28

Applicant: ST MICROELECTRONICS SRL

Inventor： POLETTO VANNI ,  MORELLI MARCO

IPC: H01L29/73 ,  G05F1/569 ,  H01L21/331 ,  H03K17/0422

Abstract: PURPOSE: To provide a method for easily adjusting saturation, unrelated to the layout of a power transistor, unlike the known anti-saturation system, in which an actually generated substrate current is traced by the operation of the transistor in the saturation region, in place of tracing the generation of direct bias of collector/base junction for the power transistor as an index of saturation condition of the transistor. CONSTITUTION: A sensing resistor RS is connected in the path to limit a current IS, which is injected to a substrate from a saturation transistor T1 . A first signal, indicating saturation condition of the transistor, is detected and this signal is compared with a reference voltage VS. When the signal becomes higher than the threshold, a base current IB is reduced.

公开(公告)号：ITUB20160548A1

公开(公告)日：2017-08-08

申请号：ITUB20160548

申请日：2016-02-08

Applicant: ST MICROELECTRONICS SRL

Inventor： POLETTO VANNI ,  ROGLEDI NICOLA

IPC: G01R27/14

公开(公告)号：DE69828869D1

公开(公告)日：2005-03-10

申请号：DE69828869

申请日：1998-05-22

Applicant: ST MICROELECTRONICS SRL

Inventor： MILANESI ANDREA ,  POLETTO VANNI

IPC: H03F3/45

公开(公告)号：ES2191407T3

公开(公告)日：2003-09-01

申请号：ES99830294

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.

公开(公告)号：DE69905238D1

公开(公告)日：2003-03-13

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.