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    42.
    发明专利
    未知

    公开(公告)号：DE69210651D1

    公开(公告)日：1996-06-20

    申请号：DE69210651

    申请日：1992-02-25

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI ,  MORELLI MARCO ,  MURARI BRUNO

    IPC: G05F1/56 ,  G05F1/569 ,  G05F1/59 ,  H02J9/06 ,  G05F1/595

    Abstract: A voltage regulator (30) comprising a first power switch (16) connected between the input terminal (11) and output terminal (13); a storage condenser (21) connected to the input terminal via a one-way switch (18); a second power switch (19) connected between the condenser and the input terminal; and a regulating element (17) connected to the output terminal and driving the power switches (16, 19) in such a manner as to maintain the output voltage (Vo) constant. For better distributing electric and thermal stress and improving the reliability and working life of the regulator by reducing the interference caused by switching of the two power switches, a drive device (31) is provided between the regulating element (17) and the switches (16, 19), for detecting the input voltage (VA) and the voltage of the condenser (VA'), and keeping both switches on as long as the input voltage is above two given thresholds (VTH1, VTH2), turning off the second switch (19) when the input voltage is higher than the condenser voltage (VA > VA') and below the first threshold (VA

    44.
    发明专利
    未知

    公开(公告)号：FR2670915B1

    公开(公告)日：1994-12-09

    申请号：FR9116274

    申请日：1991-12-20

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI ,  BRAMBILLA MASSIMILIANO

    IPC: G05F3/26 ,  G05F1/46 ,  G05F3/30 ,  G05F3/16

    Abstract: The generator comprises a first generator of voltage with thermal drift of zero, a second generator of voltage with given thermal drift, first means for applying a given load to the voltage generated by the first generator, second means for applying a given load to the voltage generated by the second generator, subtracting means for subtracting one from the other the loaded voltages generated by said first and second generator of voltage.

    45.
    发明专利
    未知

    公开(公告)号：IT1245237B

    公开(公告)日：1994-09-13

    申请号：ITMI910720

    申请日：1991-03-18

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： BRAMBILLA MASSIMILIANO ,  POLETTO VANNI

    IPC: G05F3/26 ,  G01R1/28 ,  G05F3/30 ,  H02J

    Abstract: The generator of reference voltage comprises a first generator of current (1) suitable for generating a first current (I) that varies linearly with the supply voltage, a first generator of voltage (T10, T11, R4, R6, T6, T7, I3, T12) suitable for generating a constant first voltage (VBG) with zero thermal drift, a second generator of current (T10, T11, R4, R6, T6, T7, I3, T13, T14, T15, R5) suitable for generating a second current (I1) dependent on said voltage (VBG) with zero thermal drift, a second generator of voltage (T6, T7, T10, T11) suitable for generating a second voltage (DVBE) with given thermal drift, a third generator of current (T6, T7, T10, T11, T4, T5, T8, T9) suitable for generating a third current (I2) dependent on said voltage (DVBE) with given thermal drift and means (5) for combining said currents (I, I1, I2) together so as to produce across an output resistance (R7) an output voltage (Vout) having a value equal to the product of said output resistance (R7) by said first and third current (I, I2), divided by said second current (I1).

    46.
    发明专利
    未知

    公开(公告)号：IT1241288B

    公开(公告)日：1993-12-29

    申请号：IT6790790

    申请日：1990-11-20

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI

    IPC: G06F1/24 ,  H03K3/00 ,  H03K17/24 ,  B60R

    Abstract: A process comprising stages consisting in: cutting a cylindrical bar into starting elements (1a); cold heading the starting element (1a) to produce a first cylindrical element (1b) having two portions (2, 11) of different diameters; cold heading the first element (1b) to produce a second element (1c) having a first cylindrical portion (2) and a second prismatic portion (22); cold forming the second element (1c), via backward extrusion, to produce a third element (1d) having a first cylindrical portion (2) and a second portion (42) consisting of a rectangular plate (43) and two tabs (44) extending from the plate; and finish machining the third element (1d).

    47.
    发明专利
    未知

    公开(公告)号：DE3880538T2

    公开(公告)日：1993-11-04

    申请号：DE3880538

    申请日：1988-03-14

    Applicant: SGS THOMSON MICROELECTRONICS

    Inventor： POLETTO VANNI

    IPC: H04Q3/42 ,  H04M19/00 ,  H04Q1/28

    Abstract: A so-called switching voltage regulator (1) for an interface circuit (16) in a telephone subscriber line, being of a type adapted to control the on/off states of an electronic switch (SW), connected to the interface circuit (16) and consisting of first (T1) and second (T2) transistors interconnected into a Darlington arrangement, comprises an ON-state sensor (14) connected input-wise to the collector (C1) of the first transistor (T1) and an OFF-state sensor (12) connected input-wise to the base (B1) of the first transistor (T1), and a pair of current extractor devices (11,10) respectively associated with the related bases (B1,B2) of the first (T1) and second (T2) transistors. Also provided are first (A1) and second (A2) current sources, each connected to a corresponding current amplifier (8,9) and a third hold current source (A3), the first (8) of such amplifiers powering both current extractor devices (11,10) and the second amplifier (9) and third current source (A3) being connected to the base (B2) of the second transistor (T2), as well as first (7) and second (5) dual input logic AND gates, the first gate (7) having an input (H) associated with the output of the OFF-state sensor (12) via a storage cell (6), and the second gate (5) having an input (Y) associated with the output of the ON-state sensor (14) via a further storage cell (4); each amplifier is respectively tied operatively with the outputs (U1,U2) of the first (7) and second (5) logic gates, each gate receiving on the other input (K,J) an appropriate enable signal from the regulator (1), whereas the hold current source (A3) is operatively tied directly with the enable signal of the second logic gate (5). Such a regulator (1) can minimize the current draw from the high tension power supply (-50 Volts) and make the on and off turning of the electronic switch (SW), including the pair of transistors (T1,T2) connected to the telephone subscriber line, faster.

    50.
    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.

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