摘要:
A manufacturing method for fabricating integrated electronic circuits on a semiconductor support provides a plurality of integrated circuits and provides a plurality of scribing lines. The scribing lines are located such that the electronic circuits are regularly spaced apart by the scribing lines. A network of electrical connection lines is provided in at least one of the scribing lines. Metallization strips are provided in the scribing lines as electrical connection lines, and the electrical connection lines are connected to the integrated circuit. At least one current limitation element is provided between the electrical connection line and the integrated circuit. In this manner it is possible to simultaneously perform electrical testing of all the circuits present on the same wafer.
摘要:
To detect the phase signal, particularly for alternators of motor vehicles, with simple and inexpensive measures, an active rectifier is employed, which supplies at the output a signal with constant polarity (e.g. positive) which can thus be used to verify the correct operation or malfunction of the alternator.
摘要:
A circuit for temperature compensating the inverse saturation current of a bipolar transistor having a collector region, base and emitter regions defining a base-emitter junction is disclosed. A diode element having substantially said same saturation current is parallel-connected in reverse configuration to said base-emitter junction of the bipolar transistor. If the bipolar transistor is NPN type, the diode has an anode and cathode connected respective to the emitter and base regions of the transistor.
摘要:
The invention relates to a regulator device for charging a battery by an alternator that delivers a rectified voltage including a ripple component. The device is of the type comprising a regulator circuit acting on the mean value of the rectified alternator voltage and a regulator circuit acting on the voltages of the positive peaks of the ripple component. The regulator circuits are powered by a stabilized voltage derived from the rectified alternator voltage and the device further comprises a power stage for controlling the excitation current of the alternator. According to the invention, the device further includes a regulator circuit acting on the values of the negative peaks of the ripple component. This regulator circuit is also powered by the stabilized voltage, and capable of causing the excitation current to be reduced whenever the voltage of the negative peaks falls below a given threshold.
摘要:
A voltage reference circuit with programmable thermal coefficient, comprising first and second bipolar transistors having their base terminals connected together and collector terminals connected to two legs of a current mirror circuit. The emitter terminal of the first transistor is connected to ground through two resistors in series with each other, and the emitter terminal of the second transistor is connected to a node between the two resistors. The emitter of at least one of the two transistors has discrete portions adapted to be connected electrically together in a predetermined fashion.
摘要:
A circuit for controlled discharge of energy stored in an inductive load, comprising an active semiconductor device (T) connected serially with the inductive load (L) between first and second terminals of a voltage supply source and having a control terminal for connection to a driver circuit (C), and a control circuit (R1, R2, COMP) connected between the inductive load and said control terminal. The control circuit comprises a voltage divider (R1, R2) connected between the inductive load (L) and the first terminal of the voltage supply source, and a comparator (COMP) having first and second input terminals respectively connected to the voltage divider and to a voltage reference and an output terminal which is coupled to the control terminal of the active element (T).
摘要:
A voltage regulator for an alternator has an integrated actuator stage consisting of a Darlington transistor pair and includes an auxiliary stage which, at the time of starting of the alternator, causes a low voltage drop across the actuator stage by causing only one of the two transistors in the Darlington transistor pair to conduct. This provides, at the exciter winding of the alternator, disposed in series with the actuator stage, the current required for the starting of the alternator at a low rotational speed.
摘要:
A detection circuit for detecting the voltage between phases of a polyphase alternator for the purpose of controlling the putting into operation of a regulator for regulating the charging of a motor vehicle battery by said alternator, the circuit comprising differential discrimination means for the amplitude of the voltage between a pair of phase signals delivered by the alternator. The differential discrimination means comprise a pair of transistors each constituting means for comparing the inter-phase voltage with a threshold voltage defined by its emitter-base junction voltage, said threshold voltages being of small magnitude and of opposite polarity with respect to each other.
摘要:
A regulator device for charging a battery from an alternator that delivers a rectified voltage including a ripple component. The device is of the type including a regulator circuit acting on the mean value of the rectified alternator voltage and includes a circuit for obtaining the main value, a threshold comparator, a time delay circuit, and a power stage for controlling the current flowing through the excitation winding of the alternator. According to the invention, the device includes a negative feedback circuit between a point downstream from the time delay circuit, and the input to the circuit for obtaining the mean value. The device also shifts the mean value downwards during periods when the excitation current is decreasing. The device is particularly applicable to increasing the frequency of regulation under a heavy load.
摘要:
The device for protection comprises a zener diode voltage limiter having a breakdown voltage pre-set at a value (say, 30 volts) lower than the maximum value sustainable by the protected circuit in the closed condition and a quenching circuit having a pre-set lag controlled by each overvoltage impulse and suitable for disactivating said voltage limiter and to control the opening of said protected circuit with a time lag pre-set with respect to the start of each overvoltage impulse. In succession to said voltage limiter there is introduced in addition a zener diode with a higher breakdown voltage, say, equal to 110 volts, which allows the limitation to such a value of any overvoltages having a very low energy content superimposed over overvoltages having limited amplitude and long duration.