Abstract: A motor vehicle optoelectronic monitoring device includes a sensor, imaging systems, a shutter, and a controller. Each sensor element outputs a sensor element signal based on the intensity of a light signal received by the sensor element. Each imaging system is associated with a sensor region and illuminates an object to monitor the object. Two sensor regions associated with two respective imaging systems partially overlap one another. Each imaging system illuminates the sensor elements of the associated sensor region with a light signal indicative of the object being monitored. The controller controls the shutter unit to selectively enable and disable illumination of the sensor by the imaging systems. The controller processes the sensor element electric signals output by the sensor elements in response to illumination by an imaging system to determine conditions of the object being monitored by the imaging system.

Abstract: A motor vehicle optoelectronic monitoring device includes a sensor, imaging systems, a shutter, and a controller. Each sensor element outputs a sensor element signal based on the intensity of a light signal received by the sensor element. Each imaging system is associated with a sensor region and illuminates an object to monitor the object. Two sensor regions associated with two respective imaging systems partially overlap one another. Each imaging system illuminates the sensor elements of the associated sensor region with a light signal indicative of the object being monitored. The controller controls the shutter unit to selectively enable and disable illumination of the sensor by the imaging systems. The controller processes the sensor element electric signals output by the sensor elements in response to illumination by an imaging system to determine conditions of the object being monitored by the imaging system.

Abstract: A device for detecting objects on a windshield of a motor vehicle having a hood includes an imaging unit having a lens and a sensor positioned within the interior of the motor vehicle. The lens images a windshield section associated with a primary field of vision onto the sensor. The sensor generates a sensor signal in response to the windshield section imaged thereon. The imaging unit is positioned in a viewing direction pointing diagonally downwards with respect to the windshield such that the background of the windshield section imaged onto the sensor is the hood of the motor vehicle thereby causing the background of the windshield section imaged onto the sensor to be approximately constant in order to cancel environmental conditions that can impair object detection on the windshield section. An evaluation unit evaluates the sensor signal to detect objects on the windshield section.

Abstract: A keyless access control device and method for a vehicle having a door and a door handle includes transmitting a code from a transceiver while a cover covers the door handle to prevent a user from actuating the door handle. A transponder of the user transmits an answer to the transceiver upon receipt of the code. The answer is checked to conduct a preliminary verification of whether the user is authorized to access the vehicle. The cover uncovers the door handle if the preliminary verification indicates that the user is authorized to access the vehicle. A bidirectional question and answer dialog takes place between the transceiver and the transponder to conduct a final verification of whether the user is authorized to access the vehicle upon the user actuating the door handle. The door is unlocked if the final verification is indicative of the user having access to the vehicle.

Abstract: A keyless access control device and method for a motor vehicle includes a controller, transceiver, and a mobile transponder. The transceiver transmits a low frequency signal (LF) to the transponder and, in response, the transponder transmits a first high frequency (HF) signal to the transceiver. The controller moves a vehicle door handle into a position in which the door handle can be actuated by a user in response to receipt of the first HF signal by the transponder. The transceiver transmits a second HF signal to the transponder in response to actuation of the door handle by the user. The transponder transmits an encrypted HF signal to the transceiver based on the second HF signal. The transceiver processes the encrypted HF signal to determine whether the user is authorized to enter the vehicle. The controller unlocks the vehicle door in response to the transceiver indicating that the user is authorized.

Abstract: A navigation system is described having a navigation computer, a data carrier reading device, and a navigation data carrier, navigation data of possible destinations stored on the navigation data carrier being able to be read out using the data carrier reading device and to be read into a working memory of the navigation computer. In this context, the navigation data carrier is configured such that the navigation data are stored on it sequentially so as to be able to be read out in one read operation.

Abstract: A device for detecting objects on a windshield of a motor vehicle having a hood includes an imaging unit having a lens and a sensor positioned within the interior of the motor vehicle. The lens images a windshield section associated with a primary field of vision onto the sensor. The sensor generates a sensor signal in response to the windshield section imaged thereon. The imaging unit is positioned in a viewing direction pointing diagonally downwards with respect to the windshield such that the background of the windshield section imaged onto the sensor is the hood of the motor vehicle thereby causing the background of the windshield section imaged onto the sensor to be approximately constant in order to cancel environmental conditions that can impair object detection on the windshield section. An evaluation unit evaluates the sensor signal to detect objects on the windshield section.

Abstract: The invention proposes a steering device for a motor vehicle which contains an inductive module for the contactless transmission of electric energy and data between the motor vehicle and the steering wheel, for measuring the rotational angle of the steering wheel and for generating torque between the motor vehicle and the steering wheel, with the inductive module containing a stator that is connected to the motor vehicle in a torsionally rigid fashion and a rotor that is connected to the steering wheel in a torsionally rigid fashion. Such a device should be realized in the form of a compact unit that has a very small space requirement due to the utilization of inductive principles, with said unit consisting of only a few components such that it can be manufactured in a particularly inexpensive fashion.

Abstract: The invention relates to a keyless access control device for motor vehicles, having a transceiver device assigned to the motor vehicle and a mobile transponder. The aim of the invention is to solve the technical problem of providing an access control device which makes it possible to intentionally unlock individual doors or hatches and efficiently prevents the undesired unlocking of vehicle doors. To this end an actuating element which influences a switch cooperating with a control device is protected against actuation by a movable mechanical cover until reception of a first coded message containing a coarse identification of the authorized user.

Abstract: A device for playing compact disks, particularly for motor vehicles, including a magazine for a plurality of compact disks that is arranged in and is removable from a housing, and a playback unit for playing a compact disk from the magazine, the playback unit being swing-mounted in the housing separately from the magazine and being adjustable by an adjusting mechanism, is characterized in that the magazine includes a swivel mechanism, which enables at least a portion of the compact disks located in holding compartments of the magazine to swivel away from a compact disk positioned on the playback unit, to form an unencumbered swing space between the compact disk to be played that is positioned on the playback unit and the compact disks arranged in the holding compartments of the magazine.

Abstract: A vertical semiconductor component has an integrated switching device, which delivers an electric value correlating with the rear potential. The semiconductor component includes a doping region with a hole, which is free of the doping atoms of the doping region. The hole, when properly sized and contacted, can supply an electric current correlating with the rear potential.

Abstract: The gating circuit has a power transistor (T1, T2, T3) and a current measuring resistor (R5) connected with the power transistor so that a voltage drop at the measuring resistor is a measure of a current flow in the power transistor. This voltage drop is used to trigger a current regulating transistor (T5) and a temperature measuring transistor (T9). Below a predetermined temperature, the current flow is limited solely by the current regulating transistor (T5). Above this predetermined temperature the collector current is further reduced via the temperature measuring transistor (T9) and a further transistor (T10) so as to protect the power transistor from thermal overload.

Abstract: A rectifier arrangement for a three-phase generator having at least one power diode allocated to each half-wave of each phase and a cooling arrangement for the power diodes. The power diodes may be designed as diode chips and be arranged between two diametrically opposed heat sinks, while being oriented with respect to polarity and electrically and/or thermally conductive.

Abstract: Semiconductor arrangements, in particular diodes, have a p-layer and two n-layers that are doped to varying degrees of thickness. The p-n junction between the p-layer and the heavily doped n-layer is arranged in the chip so as to allow it to lie completely inside the chip. The p-n junction between the p-layer and the n-layer is situated in the outside areas of the chip. This arrangement does not permit any high field strengths to occur on the outside of the chip and, at the same time, it makes it possible for easily reproducible properties to be achieved. The manufacturing method can also be carried-out outside of a clean room.

Abstract: The high-voltage semiconductor device includes a single chip having a plurality of semiconductor elements connected in series with each other which includes an insulating substrate (2); a monocrystalline semiconductor carrier (1) of a first conductivity type applied to the insulating substrate (2); at least two terminals (5,6) located on opposite sides of the chip; strip-like areas (3) of a second conductivity type formed in the monocrystalline semiconductor carrier (1), the strip-like areas (3) each extending across the semiconductor carrier (1) at right angles to a longitudinal direction between the at least two terminals, forming pn junctions in the semiconductor carrier (1), being spaced from each other in the longitudinal direction over the single chip and penetrating an entire thickness of the semiconductor carrier; at least one doped region (7) in the strip-like areas (3) forming an at least four layered component in the single chip; and a light responsive device for reducing a switching voltage of the

Abstract: A semiconductor device for influencing the breakdown voltage of a transistor with a surface electrode arranged over a space charge region, separated from the same by an oxide layer. The surface electrode is at a potential, as determined by a voltage divider, between the potentials of the base and collector of the transistor. The surface electrode includes two electrode plates insulated from one another, with the first electrode plate extending over a junction between a highly doped n.sup.+ collector region and a lightly doped n.sup.- collector region, and a junction between the lightly doped n.sup.- collector region and a p-type base region. The second electrode plate is bonded partly over the oxide layer and partly with the highly doped n.sup.+ collector region.

Abstract: The invention relates to a voltage limiter for a transistor circuit with semiconductors (T.sub.20 and T.sub.21) in the arrangement of a plurality of successive amplifier stages, with a reference element (Zener diode Z.sub.20) and with at least one voltage divider arrangement (voltage divider R.sub.21 /R.sub.22). In accordance with the invention, the reference element (Zener diode Z.sub.20) is disposed downstream of the triggering circuit of the first stage or even closer at the output of the voltage limiter circuit for reducing the oscillation tendency.

Abstract: A circuit arrangement for operating a gas-discharge lamp is proposed, in which the high voltage for starting the gas-discharge lamp is generated by means of the energy stored in a transformer or capacitor. In order to obtain a steep rise in voltage of the starting voltage, the starting voltage is provided to the gas-discharge lamp via a voltage-controlled switch. A break-over diode, which has very short switching times, is proposed as the voltage-controlled switch. The starting circuit is switched off after starting. This circuit arrangement is also particularly suitable for starting gas-discharge lamps which are warm from operation. In consequence, it is particularly suitable for motor vehicle headlights.