公开(公告)号：JPH01177453A

公开(公告)日：1989-07-13

申请号：JP26927988

申请日：1988-10-25

Applicant: MARELLI AUTRONICA

Inventor： GIUZETSUPE CHIRIBERUTO

IPC: F02P3/04 ,  F02P3/045 ,  F02P7/03 ,  F02P9/00

Abstract: PURPOSE: To prevent unexpected generation of spark by employing a control circuit for gradually changing a voltage between collector emitters of a switching transistor for an ignition coil so as to control a primary switching operation speed for transmitting a current to a primary winding of the ignition coil. CONSTITUTION: In a circuit portion for controlling the spark generation in an ignition plug SP of an ignition system, a switching transistor T comprising a pair of individual transistors which are Darlington coupled with their common collector connected to a primary winding 5 of a coil and their emitters grounded. The collector of this transistor T is connected to a resistance type potential divider comprising two resistors 7 and 8. This resistance type potential divider is connected to an inverse input of a differential amplifier 9. Further, a ramp generator 10 is connected to a non-inverse input of a differential amplifier 9. A control input 10a of the ramp generator 10 is connected to an output of MPU. The output of the differential amplifier 9 is connected to a base of the transistor T through a resistor 11.

公开(公告)号：JPS63246469A

公开(公告)日：1988-10-13

申请号：JP4853488

申请日：1988-03-01

Applicant: MARELLI AUTRONICA

Inventor： GIUZETSUPE CHIRIBERUTO ,  GUIDO SUKORURO

IPC: F02P15/00 ,  F02P3/04 ,  F02P3/045 ,  F02P3/05 ,  F02P17/10 ,  F02P17/12

公开(公告)号：JP2582840B2

公开(公告)日：1997-02-19

申请号：JP4853488

申请日：1988-03-01

Applicant: MARELLI AUTRONICA

Inventor： GIUZETSUPE CHIRIBERUTO ,  GUIDO SUKORURO

IPC: F02P15/00 ,  F02P3/04 ,  F02P3/045 ,  F02P3/05 ,  F02P17/10 ,  F02P17/12

公开(公告)号：JPH01177113A

公开(公告)日：1989-07-13

申请号：JP30764888

申请日：1988-12-05

Applicant: MARELLI AUTRONICA

Inventor： GIUZETSUPE CHIRIBERUTO

IPC: G05F1/10 ,  G05F1/56 ,  H02H5/04 ,  H02H7/20 ,  H02H9/02 ,  H03K17/08

Abstract: PURPOSE: To effectively protect an integrated circuit from heat without damaging the operation function of the integrated circuit by building a thermal switch in the integrated circuit and reducing the electron current of an output transistor TR at the time when the temperature exceeds a threshold. CONSTITUTION: A control circuit 8 is connected to a resistance 5 and a threshold signal generation circuit 7, and the output of this control circuit 8 is connected to the base of a TR 3 or the control input of a circuit part 2 of an integrated circuit 1. When the current flowing in the collector-emitter circuit of the power TR 3 exceeds the threshold generated from a threshold signal generation circuit 7, the current supplied to the base of the TR 3 is reduced. Thus, the effective heat protection device for an integrated power circuit applicable to the automobile electronic device field is obtained.

公开(公告)号：JPS63173819A

公开(公告)日：1988-07-18

申请号：JP32261587

申请日：1987-12-18

Applicant: MARELLI AUTRONICA

Inventor： GIUZETSUPE CHIRIBERUTO

IPC: F02B37/12 ,  F02B37/18