公开(公告)号：DE68913677D1

公开(公告)日：1994-04-14

申请号：DE68913677

申请日：1989-12-04

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO

IPC: F02P11/02 ,  F02P3/04 ,  F02P3/055 ,  F02P17/12 ,  H02M9/00 ,  H03K17/08 ,  H03K17/082 ,  F02P17/00

Abstract: The diagnostic circuit comprises a comparator (11) having a first input (12) connected to the power device (5) and a second input (14) connected to a reference voltage generator (15). A signal generator (17) is connected to the output of comparator (11) so as to generate a diagnostic signal when comparator (11) detects a current in the power device which is higher than a preset value corresponding to said reference voltage. Means (16) sensitive to the temperature of the power device act on the reference voltage generator (15) so as to reduce the value of said reference voltage in response to an increase in the temperature beyond a preset limit.

公开(公告)号：DE69004147D1

公开(公告)日：1993-12-02

申请号：DE69004147

申请日：1990-04-17

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： RACITI SALVATORE ,  PALARA SERGIO

IPC: H01L29/73 ,  H01L21/331 ,  H01L27/02 ,  H01L27/06 ,  H01L29/732 ,  H03K17/082 ,  H03K17/08 ,  H02H9/04 ,  H02H7/20

Abstract: The protection device (3) comprises automatic commutating means (QP1, QP2; QP3) interposed between the base of the transistor (Q2) to be protected and the collector of the power device (Q3, Q4) to cause a flow of current having a low voltage drop between said base and said collector when the collector voltage (Vc) falls below a predetermined value.

公开(公告)号：IT8922289A1

公开(公告)日：1991-05-07

申请号：IT2228989

申请日：1989-11-07

Applicant: SGS THOMSON MICROELECTRONICS S R L

Inventor： PALARA SERGIO ,  PAPARO MARIO

IPC: H01L20060101 ,  H01L21/822 ,  H01L29/74 ,  H01L27/02 ,  H01L27/04

公开(公告)号：DK630889D0

公开(公告)日：1989-12-13

申请号：DK630889

申请日：1989-12-13

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO ,  MONACO PAOLO

IPC: H02P7/288 ,  H02M7/538 ,  H02P7/00 ,  H03K4/94 ,  H03K17/0812 ,  H03K17/16 ,  H03K17/687 ,  H03F3/26

Abstract: The generator of drive signals comprises a ramp generator (11) suitable for receiving a square waveform input signal and for converting it into an output signal variable between a lower level and an upper level with upward and downward ramps having a preset slope, a first comparator (21) with a non-inverting input connected to the output of said ramp generator (11) and an inverting input connected to a first reference signal source (23) and a second comparator (22) with an inverting input connected to the output of said ramp generator (11) and a non-inverting input connected to a second reference signal source (24).

公开(公告)号：IT8921150D0

公开(公告)日：1989-07-11

申请号：IT2115089

申请日：1989-07-11

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO

IPC: G05F1/56 ,  H02H9/04

Abstract: To a power device (T1, T2; T11) with related control circuit (A1, T3), both of the semiconductor type in the form of an integrated circuit, there is associated a protection circuit which comprises a switch (T6) sensitive to negative overvoltages across the power supply and suitable for enabling a limiter (T4, Z1; T14) of the voltage applied across the power device (T1, T2; T11).

公开(公告)号：DE69012898T2

公开(公告)日：1995-05-11

申请号：DE69012898

申请日：1990-07-05

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO

IPC: G05F1/56 ,  H02H9/04

Abstract: To a power device (T1, T2; T11) with related control circuit (A1, T3), both of the semiconductor type in the form of an integrated circuit, there is associated a protection circuit which comprises a switch (T6) sensitive to negative overvoltages across the power supply and suitable for enabling a limiter (T4, Z1; T14) of the voltage applied across the power device (T1, T2; T11).

公开(公告)号：DE68913677T2

公开(公告)日：1994-09-08

申请号：DE68913677

申请日：1989-12-04

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO

IPC: F02P11/02 ,  F02P3/04 ,  F02P3/055 ,  F02P17/12 ,  H02M9/00 ,  H03K17/08 ,  H03K17/082 ,  F02P17/00

Abstract: The diagnostic circuit comprises a comparator (11) having a first input (12) connected to the power device (5) and a second input (14) connected to a reference voltage generator (15). A signal generator (17) is connected to the output of comparator (11) so as to generate a diagnostic signal when comparator (11) detects a current in the power device which is higher than a preset value corresponding to said reference voltage. Means (16) sensitive to the temperature of the power device act on the reference voltage generator (15) so as to reduce the value of said reference voltage in response to an increase in the temperature beyond a preset limit.

公开(公告)号：DE3869656D1

公开(公告)日：1992-05-07

申请号：DE3869656

申请日：1988-05-13

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO ,  PERNICIARO SPATRISANO ANTONIO ,  PAPARO MARIO ,  GIACALONE PIETRO

IPC: H01L23/28 ,  H01L21/56 ,  H01L23/495 ,  H01L23/52 ,  H01L25/04 ,  H01L25/07 ,  H01L25/18

Abstract: The circuit comprises several metal plates (A,B,C) onto each of which a chip (D,E,F) is soldered, the chips being connected together and to their respective rheophores (1,2.....9) by means of bonding wires. The plates and the other internal electrical components are reciprocally insulated by means of the resin which constitutes the encapsulation.

公开(公告)号：DE3584988D1

公开(公告)日：1992-02-06

申请号：DE3584988

申请日：1985-03-30

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO ,  TORAZZINA ALDO

IPC: H03F1/30

Abstract: A capacitor which is progressively chargeable in response to a switching on of the equipment, however brought about, is associated with an oscillating circuit with intervention threshold. As the load voltage of said capacitor increases the oscillating circuit shifts from a first to a second operating state, generating a switch-on current for the audio amplifier. The latter can be placed in stand-by condition by discharging to earth said capacitor by means of a suitable switch.

公开(公告)号：IT1228842B

公开(公告)日：1991-07-05

申请号：IT1950289

申请日：1989-02-21

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： PALARA SERGIO

IPC: H01L21/822 ,  G05F1/10 ,  G05F3/22 ,  H01L21/8222 ,  H01L27/04 ,  H01L27/082 ,  H03K17/042 ,  H03K17/615 ,  H03K17/64 ,  H01L

Abstract: A circuit (1) for regulating the base current (IB) of a semiconductor power device (2) is accomplished with a first amplifier (10) which measures the difference in potential (V1) across a first detection resistance (11) which is passed through by a base current (IB), with a second amplifier (12), which measures the voltage (V2) across a second detection resistance (7) passed through by the emitter current (IE) of the power device (2), and with a means (13) sensitive to the difference between a current (I1), present at the output of the first amplifier (10), and a current (I2) present at the putput of the second amplifier (12). Said sensitive means (13), acting on a variable current generator (8), maintains currents I1 and I2 equal to one another, and thus maintains constant the ratio between the emitter current (IE) of the power device (2) and the base current (IB) of the same.