公开(公告)号：JPH03167699A

公开(公告)日：1991-07-19

申请号：JP27888390

申请日：1990-10-16

Applicant: MARELLI AUTRONICA

Inventor： FURANKO MAROBERUTEI ,  JINO PORITO ,  FURANKO SARERUNO

IPC: G08C13/00 ,  F02B1/04 ,  G01R19/22 ,  H03G1/04

Abstract: PURPOSE: To sample-process input signals in the same phase regardless of the polarity by sample-processing the input signals during the only phase period of a clock for stipulating the operation of a switching capacitor circuit. CONSTITUTION: An FF circuit 12 is operated by phase signals -ψ2 and outputs signals Q and Q and the switches Sa-Sd of multiplexers MA and MB are controlled by the signals Q and Q. During an integration phase, the input signals Vin are sample-processed during the ON period of the phase signals ψ2 in a rectification and integration circuit 2-3. When the signals Vin are the positive polarity, the multiplexers MA and MB match the phase ψA with the phase ψ1 and the phase ψB with the phase ψ2 . Thus, the signals Vin are integration- processed by an integration capacitor C3 in a non-inversion mode in the period of the phase ψ1 . On the other hand, when the signals Vin are the negative polarity, the multiplexers MA and MB match the phase ψA with the ψ2 and phase ψB with the ψ1 . In this case, the capacitor C, integrationprocesses the signals in an inversion mode.

公开(公告)号：JPH03180918A

公开(公告)日：1991-08-06

申请号：JP30230590

申请日：1990-11-06

Applicant: MARELLI AUTRONICA

Inventor： BUARERIO JIYORUJIETSUTA ,  IBESU REGURANDO ,  FURANKO SARERUNO ,  JIYANRUIJII MORETSURO

IPC: G06F3/00 ,  H03K17/082

Abstract: PURPOSE: To prevent the damage of a transistor TR by permanently disabling the TR concerned with a control part, which detects short-circuit, in the case of repeated occurrence of short-circuit in a load. CONSTITUTION: When a short-circuit state occurs between the drain of a TR Mi and the positive pole of a power source VBD, a diagnostic logic circuit 13 detects this state and applies a disable signal to a control circuit 12 for a temporary stop period. If a short-circuit state between the drain of the TR Mi and the positive pole of the power source VBD is detected again after this period, a first breakdown signal is outputted, and the disable signal is permanently applied to the control circuit 12. A driver circuit 12 is stopped finally in this manner, and then, the signal of a terminal CMD1 is returned to level '0' and is kept in this level. Thus, stress of the TR M1 is eliminated to prevent the damage of the TR M1.

公开(公告)号：JPH03152471A

公开(公告)日：1991-06-28

申请号：JP26618290

申请日：1990-10-02

Applicant: MARELLI AUTRONICA

Inventor： FURANKO MAROBERUTEI ,  JINO PORITO ,  FURANKO SARERUNO

IPC: G01P15/125 ,  F02B1/04 ,  G01P15/09

Abstract: PURPOSE: To make it possible to utilize the characteristics of the arrival signal from a sensor to the maximum limit by filtering the output signal of an amplitude limiter having two CMOS transistors connected to the output of the sensor and changing the level. CONSTITUTION: The signal supplied by a capacitive sensor S or particularly piezoelectric acceleration sensor is processed by a circuit 2 via an interface circuit IC integrated at a single substrate by CMOS technology. At this time, the circuit IC entirely connected to a power source VDD of DC current and ground limits the input signal by an amplitude limiter 3 having two CMOS transistors to protect it against overvoltage. A circuit 4 has an inverting amplifier A connected to a DC power source VR lower than the power source VDD, capacitive impedance circuits Z1 , Z2 converts the signal into DC signal, limits the band width of the signal from the sensor S and attenuates the ultra-low frequency component unnecessary for the signal.

公开(公告)号：JPH03149336A

公开(公告)日：1991-06-25

申请号：JP26618190

申请日：1990-10-02

Applicant: MARELLI AUTRONICA

Inventor： JINO PORITO ,  FURANKO MAROBERUTEI ,  FURANKO SARERUNO

IPC: F02D45/00 ,  F02B1/04 ,  F02P5/152 ,  G01L23/22

Abstract: PURPOSE: To detect pinking by providing comparison and process means with weighted and averaged signals of samples of at least third detection signals which are the last and the second last to be received. CONSTITUTION: Two channels A, B are provided for detecting and processing signals provided by an accelerometric sensor S operating in two frequency bands in which peaks indicative of the occurrence of pinking exist. In each combustion phase, a third channel, also connected to the sensor S, provides a signal representative of the noise component of the signal from the sensor S, in a frequency band in which the peaks do not occur. The signals provided by the channels A, B are integrated and then compared with a reference signal generated in dependence on the noise component of a cylinder detected by the cylinder. Thus, the cylinder producing the pinking is detected.