Abstract: A method for monitoring a door contact switch of a driver's door of a motor vehicle locked in an idle state includes detecting an unlocking of the driver's door of the motor vehicle, and detecting whether a change in a door contact signal of the door contact switch takes place after the unlocking of the driver's door. If a change in the door contact signal has been detected, a plausibility counter is initialized, otherwise the method includes detecting whether a drive unit of the motor vehicle is activated. A “door contact implausible” state is established and the plausibility counter (P) is incremented if the activation of the drive unit has been detected in step d).

Abstract: A method for monitoring a door contact switch of a driver's door of a motor vehicle locked in an idle state includes detecting an unlocking of the driver's door of the motor vehicle, and detecting whether a change in a door contact signal of the door contact switch takes place after the unlocking of the driver's door. If a change in the door contact signal has been detected, a plausibility counter is initialized, otherwise the method includes detecting whether a drive unit of the motor vehicle is activated. A “door contact implausible” state is established and the plausibility counter (P) is incremented if the activation of the drive unit has been detected in step d).

Abstract: A process for controlling an electrically driven window pane for a motor vehicle which has an operating element for triggering the pane motion. After the operation of the operating element, the window pane is moved by a driving motor until a soft-stop position is reached, the motion of the driving motor being detected for determining the window pane position. A multiple operation of the operating element within a definable time period causes an overshooting of the soft-stop position to the mechanical stop, in which the position of the pane is newly defined.

Abstract: A method implements keyless access to at least one vehicle door. An access system has at least one central control unit for transmitting and receiving control signals, at least one first door control unit which is assigned to a first vehicle door and has the purpose of unlocking or locking a vehicle door, at least one first proximity sensor for sensing an object located in the direct vicinity of the first proximity sensor, and a central check system which communicates with the central control unit in order to authenticate an opening signal of an identification signal transmitter. The first proximity sensor outputs a proximity signal when the object is sensed, so that the first door control unit is changed by the proximity signal from a first operating state into a second operating state.

Abstract: In a method for interference suppression using a quality-adjustable bandpass filter in a receiver circuit for carrier-modulated received signals (SIN), the bandpass filtered received signal (Bout) is demodulated, and a switching process is triggered with the demodulated received signal (Dout). In order to eliminate internal or self-induced interferences that would be caused by a switching process in the output portion of the receiver, a quality reduction of the bandpass filter is correlated with the switching process that causes the interference. The method is especially suitable in connection with circuits for infrared receivers, which can thereby be manufactured in a small size, without external components, and thus economically.

Abstract: An energy-saving method for wireless reception of data modulated on a carrier signal is carried out in a receiver circuit including a first group and a second group of circuit elements. The first group of the circuit elements required for recovering the data from the modulated carrier signal are supplied intermittently with electrical energy, while the remaining circuit elements of the second group are supplied with uninterrupted electrical energy. After an intermittent unpowered phase without electrical energy being supplied to the first group of circuit elements, the receiver can be operated in the next intermittent powered phase of the second group of circuit elements with parameters that determined the receiver properties which were present in the last reception phase and that have been stored, thus eliminating the time required for renewed tuning in.

Abstract: A process for controlling an electrically driven window pane for a motor vehicle which has an operating element for triggering the pane motion. After the operation of the operating element, the window pane is moved by a driving motor until a soft-stop position is reached, the motion of the driving motor being detected for determining the window pane position. A multiple operation of the operating element within a definable time period causes an overshooting of the soft-stop position to the mechanical stop, in which the position of the pane is newly defined.

Abstract: A method of controlling an adjusting drive having a squeeze-in protection for electrically actuated window panes in motor vehicles, having an operating element for controlling the adjusting drive and a squeeze-in protection. The range of motion when lifting the window pane is divided into a first range (B1) and a second range (B2). In the first range (B1), the window pane is manually controlled during its lifting motion, so that the operating element must be operated for the lifting motion. When the operating element is released, the window pane (11) the lifting motion is stopped. In the second range (B2), the lifting motion of the window pane (11) is automatically implemented after a brief operation of the operating element.

Abstract: An integrated circuit can be tested externally at its normal signal output pin(s) without requiring additional testing output pins or test measuring pads. The integrated circuit includes a circuit unit that generates a normal output signal provided to the signal output pin in a normal operating mode and generates a test signal in a testing mode, a switching element that selectively does or does not connect the test signal from the circuit unit to the signal output pin, and a control unit that controls the switching element with a control signal responsive to the potential level present at the signal output pin. When the circuit is to be tested, a defined voltage is applied to the signal output pin by a voltage divider formed of resistors between a supply voltage and a reference voltage. This causes the control unit to close the switching element.

Abstract: In previously known methods for testing internal signals of an integrated circuit, additional output pins were required which, in general, were linked to additional measuring pads within the integrated circuit. In the new method, the circuit functions are tested by using the output pins at which the output signal is present during normal operation of the integrated circuit. By means of a simple, external connection, with which a defined voltage value is set at the signal output, the integrated circuit is switched by means of an integrated control unit into a test mode in which it applies selected signals, which are to be tested, at the signal output. There is no need for additional internal measuring pads or additional output pins.

Abstract: An integrated circuit can be tested externally at its normal signal output pin(s) without requiring additional testing output pins or test measuring pads. The integrated circuit includes a circuit unit that generates a normal output signal provided to the signal output pin in a normal operating mode and generates a test signal in a testing mode, a switching element that selectively does or does not connect the test signal from the circuit unit to the signal output pin, and a control unit that controls the switching element with a control signal responsive to the potential level present at the signal output pin. When the circuit is to be tested, a defined voltage is applied to the signal output pin by a voltage divider formed of resistors between a supply voltage and a reference voltage. This causes the control unit to close the switching element.

Abstract: Method for interference suppression by means of a quality-adjustable bandpass filter in a receiver circuit for carrier-modulated received signals (SIN), in which the bandpass filtered received signal (Bout) is demodulated, and a switching process is triggered with the demodulated received signal (Dout). Known receiver circuits, however, have the disadvantage, due to small dimensions of the circuit surface area, that interferences, for example in the form of oscillator oscillations due to capacitive couplings, are caused by switching processes in the output portion of the receiver, especially by driving transistors. These interferences cannot be eliminated by an amplifier regulation provided in the circuit. According to the invention, such internal or self-induced interferences or disturbances are eliminated in that a quality reduction of the bandpass filter is correlated with the switching process that causes the interference.

Abstract: In previously known methods for testing internal signals of an integrated circuit, additional output pins were required which, in general, were linked to additional measuring pads within the integrated circuit.

Abstract: The present invention relates to an energy-saving method for the wireless reception of data modulated on a carrier signal by means of a receiver circuit including a first group and a second group of circuit elements.

Abstract: A heterodyne receiver operating on the principle of synchronous modulation for time-signal reception where a first mixer is driven by the first phase-locking loop which is fed from a reference frequency source and a switchable precharging value. By means of switched frequency dividers and the precharging values, internationally different clock frequencies (JP: 40 kHz; USA/GB: 60 kHz; EU/D: 77.5 kHz) can be processed and converted to the intermediate frequencies. These are then synchronously demodulated by means of a second mixer which receives its signal from the second phase-locking loop that is driven through the intermediate frequency signal via the phase comparator, and also through the control signal of the phase-locking loop, so that only residual error adjustment need be performed.