摘要:
The resistances of resistors arranged in a matrix form in a pressure-sensitive resistor mat are measured with high accuracy and using simple circuitry by the fact that the output of an operational amplifier is connected to each row conductor and each column conductor, which are connected to the resistor. A voltage is selectively applied to the individual resistors by appropriately activating the operational amplifiers. Each operational amplifier associated with the row or column conductors is equipped with a current balancing circuit which detects the output current of the operational amplifier connected to the selected resistor which flows through this resistor. A processor determines the individual resistance values from the currents flowing through the individual resistors and the voltage drops across those resistors.
摘要:
An electronic device includes a sensor which detects acceleration values, and a control unit linked to the sensor. The control unit drives switching elements, which are disposed in a series circuit including at least one squib. When the switching elements are driven, the squib receives a current. This current flows at the same time through the also series-connected resistor, across which a voltage drop arises, which is analyzed by a comparator. The pulse duty factor of the current driving is modified as a function of the amperage of the current flowing through the squib.
摘要:
A semiconductor component that is able to be produced simply, quickly, and yet reliably and that usable for power applications, and including a semiconductor chip, a lower, first main electrode layer formed on a first side of the semiconductor chip, a lower control electrode layer formed on the first side, an insulation layer formed on the first side between the lower first main electrode layer and the lower control electrode layer and which partly covers the lower first main electrode layer, an upper first main electrode layer which is formed on the lower first main electrode layer, an upper control electrode layer which is formed on the lower control electrode layer and the insulation layer and extends on the insulation layer partially above the lower first main electrode layer, and a second main electrode layer formed on a second side of the semiconductor chip.
摘要:
A semiconductor component that is able to be produced simply, quickly, and yet reliably and that usable for power applications, and including a semiconductor chip, a lower, first main electrode layer formed on a first side of the semiconductor chip, a lower control electrode layer formed on the first side, an insulation layer formed on the first side between the lower first main electrode layer and the lower control electrode layer and which partly covers the lower first main electrode layer, an upper first main electrode layer which is formed on the lower first main electrode layer, an upper control electrode layer which is formed on the lower control electrode layer and the insulation layer and extends on the insulation layer partially above the lower first main electrode layer, and a second main electrode layer formed on a second side of the semiconductor chip.
摘要:
In a method of monitoring a voltage supply of a control unit in a motor vehicle, a supply module which provides the voltages is connected to the components of the control unit via a RESET line and the RESET line is tested every time the control unit is started or all monitoring limits of the supply module show no fault again after the faults of the monitored voltages have been filtered. This test occurs by forced periodic pulses which are generated on the basis of a shift in the limits of the monitoring bands of the supply voltages. The reference voltages VREGUL and VREF are kept independent of each other here in order to prevent system perturbations.
摘要:
A bus station and a bus system in which two bus stations are connected by at least one bus conductor. Messages are transmitted via a current flowing over the bus conductor. The bus station is supplied with operating current over the bus conductor. For this purpose, an energy storage device stores operating energy. In order to transmit messages, the bus station closes the switch and thus generates a current flow, which discharges the energy storage device of the bus station via the switch and resistor. The station transmits messages by causing the current to flow in the opposite direction by closing the switch. In order to prevent the energy storage device from discharging, the switch is opened.
摘要:
A plug strip connection, including a plug connector strip, a main board having terminals and an intermediate circuit board. The plug connector strip includes a group of individual connecting elements which extend at an angle to the intermediate circuit board and are fastened to the latter. The intermediate circuit board extends at an angle to the main board and is fastened to it. The individual plug connecting elements are electrically connected to the terminals via the intermediate circuit board. A method for producing a plug strip connection is also described. A plug-and-socket connector strip, a main board having terminals and an intermediate circuit board are provided. A group of individual plug connecting elements is positioned as a plug connector strip, and the plug connector strip is fastened to the intermediate circuit board, individual plug connecting elements extending perpendicular to the intermediate circuit board; electrical contacts being set up between the intermediate circuit board and the plug connector strip and the intermediate circuit board being fastened to the main board, the intermediate circuit board extending perpendicularly to the main board. In addition, the method includes: setting up electrical contacts between the main board and the intermediate circuit board.
摘要:
A bus driver circuit which permits input of data, which can be identified reliably by modules on the bus line, onto the bus in the event of a short circuit on a conductor in a two-conductor bus system without requiring complicated circuitry is composed of several electrically controllable switches which form an H-bridge configuration, at least one switch being present in each of the five H-bridge branches. The two bus conductors are each connected to one end of the shunt arm of the H-bridge. The individual switches in the longitudinal branches of the H-bridge can be switched to at least two positions which are at different voltage levels.
摘要:
The firing apparatus for a gas generator of a restraint device in a vehicle has a firing chamber filled with a pyrotechnic material. A semiconductor chip, in which in addition to a firing resistor at least one circuit activating the latter is integrated, is arranged outside the firing chamber in such a way that the thermal energy generated by the firing resistor during a firing operation is transferred to the pyrotechnic material in the firing chamber. To ensure that upon firing, the circuit elements in the firing apparatus remain undestroyed to the greatest possible extent, the semiconductor chip is retained on a circuit board; the circuit board is retained, with the side opposite the semiconductor chip, on a wall of the firing chamber; and an opening is present in the wall of the firing chamber and in the circuit board, so that a passage exists between the firing resistor mounted on the semiconductor chip and the pyrotechnic material in the firing chamber.