Abstract: A microcontroller which can be coupled to an execution unit. For the operation of the microcontroller, a program in the microcontroller generates a message as a function of input data and transmits said message to the execution unit. For the operation of the microcontroller, accompanying the message, a check code is generated as a function of the execution of the program and is transmitted to the execution unit. For the operation of the execution unit, a test determines whether the check code is logically predefined and/or received within a predetermined time interval, wherein in the case of a positive test result, the message is designated as valid, and in the case of a negative result, the message is designated as invalid.

Abstract: An electronic device, which for example includes a sensor element such as a rotational speed sensor, comprises a first network (4) having a first microcontroller (8) and a first supply voltage source (10). It also comprises a second network (4) having a second microcontroller (8) and a second supply voltage source (30). The electronic device is also provided with decoupling elements (42-50) which are adapted to decouple the networks (4, 6) form interferences.

Abstract: A microcontroller which can be coupled to an execution unit. For the operation of the microcontroller, a program in the microcontroller generates a message as a function of input data and transmits said message to the execution unit. For the operation of the microcontroller, accompanying the message, a check code is generated as a function of the execution of the program and is transmitted to the execution unit. For the operation of the execution unit, a test determines whether the check code is logically predefined and/or received within a predetermined time interval, wherein in the case of a positive test result, the message is designated as valid, and in the case of a negative result, the message is designated as invalid.

Abstract: The invention relates to a method for monitoring the execution of a program in a microcomputer of an electronic device, especially a sensor circuit for motor vehicles. According to the inventive method, the program processes input data and produces output data, copies a program in addition to the program which is executed, said copy being stored in an address area in the micro-computer other than the program, using the input data provided for the program. The output data of the copy is compared to the data of the program and an error message is produced if the programs are not consistent.

Abstract: An electronic device, which for example includes a sensor element such as a rotational speed sensor, comprises a first network (4) having a first microcontroller (8) and a first supply voltage source (10). It also comprises a second network (4) having a second microcontroller (8) and a second supply voltage source (30). The electronic device is also provided with decoupling elements (42-50) which are adapted to decouple the networks (4, 6) form interferences.

Abstract: A method for monitoring a rotation rate sensor comprising a vibration gyroscope that represents a band-pass filter and that is part of at least one control circuit, wherein the control circuit comprises a digital and analog components and excites the vibration gyroscope to vibrate with its natural frequency by supplying it with an excitation signal. An output signal can be gathered from the vibration gyroscope from which the excitation signal and the rotation rate signal can be derived by filtering and amplification. Redundant analog components and at least one analog to digital converter are used to measure analog signals and read characteristic values within the digital components and compare the measured characteristic values with limiting values.

Abstract: The invention relates to a method and to an arrangement for eliminating false messages in monitoring systems for electronic devices, especially for sensor circuits in motor vehicles. According to the inventive method, error messages increment a counter and an alarm is triggered when a predetermined position on the counter is reached.

Abstract: The invention relates to a method for monitoring a vibrating gyroscope which represents a resonator and forms part of at least one control loop that excites the vibrating gyroscope with its natural frequency by supplying an excitation signal. An output signal can be extracted from the vibrating gyroscope, the excitation signal being derived from said output signal by means of filtering and amplifying. According to the invention, the quality of the resonator is measured. If the measured quality is below a threshold value, an error message is generated.

Abstract: The invention relates to a security device for a sensor, especially a rotational speed sensor, wherein a sensor element and functional components enable the sensor to function and produce a sensor output signal. Said functional components form a functional section. Control components are provided in a control section and monitoring components are provided in a monitoring section. The control components are embodied in such a manner that they can control the functional components in a continuous manner and the monitoring components are embodied such that they can monitor the control components at least once during the a working cycle.

Abstract: The invention relates to a method for monitoring a rotation rate sensor comprising a vibration gyroscope that represents a band-pass filter and that is part of at least one control circuit. Said control circuit is comprised of digital and analog components and excites the vibration gyroscope to vibrate with its natural frequency by supplying it with an excitation signal. An output signal can be gathered from the vibration gyroscope from which the excitation signal and the rotation rate signal can be derived by filtering and amplification. The inventive method is characterized in that redundant analog components and at least one analog to digital converter is used to measure analog signals and read characteristic values within the digital components and compare them with limiting values.

Abstract: In a method for monitoring a rotation rate sensor with a vibrational gyroscope which has a first input and a first output which form part of a primary control loop which excites the vibrational gyroscope by supplying an excitation signal to the first input at its natural frequency, where the vibrational gyroscope also has a second input and a second output which form part of a secondary control loop, where an output signal can be taken from the second output, said output signal being amplified and subjected to analog/digital conversion and then demodulated into an inphase component and a quadrature component. The components are filtered and are then modulated again and compiled to form a driver signal which is supplied to the second input. A rotation rate signal is derived from the inphase component, the inphase component and the quadrature component have a test signal added to them whose frequency brings about sidebands which are situated in the driver signal outside of the second control loop's passband.

Abstract: The invention relates to a method for monitoring the execution of a program in a microcomputer of an electronic device, especially a sensor circuit for motor vehicles. According to the inventive method, the program processes input data and produces output data, copies a program in addition to the program which is executed, said copy being stored in an address area in the micro-computer other than the program, using the input data provided for the program. The output data of the copy is compared to the data of the program and an error message is produced if the programs are not consistent.

Abstract: The invention relates to a method for monitoring a vibrating gyroscope which represents a resonator and forms part of at least one control loop that excites the vibrating gyroscope with its natural frequency by supplying an excitation signal. An output signal can be extracted from the vibrating gyroscope, the excitation signal being derived from said output signal by means of filtering and amplifying. According to the invention, the quality of the resonator is measured. If the measured quality is below a threshold value, an error message is generated.

Abstract: The invention relates to a method and to an arrangement for eliminating false messages in monitoring systems for electronic devices, especially for sensor circuits in motor vehicles. According to the inventive method, error messages increment a counter and an alarm is triggered when a predetermined position on the counter is reached.

Abstract: In a method for monitoring a rotation rate sensor with a vibrational gyroscope which has a first input and a first output which form part of a primary control loop which excites the vibrational gyroscope by supplying an excitation signal to the first input at its natural frequency, where the vibrational gyroscope also has a second input and a second output which form part of a secondary control loop, where an output signal can be taken from the second output, said output signal being amplified and subjected to analog/digital conversion and then demodulated into an inphase component and a quadrature component, where the components are filtered and are then modulated again and compiled to form a driver signal which is supplied to the second input, and where a rotation rate signal is derived from the inphase component, the inphase component and the quadrature component have a test signal added to them whose frequency brings about sidebands which are situated in the driver signal outside of the second control loo

Abstract: A circuit arrangement includes a first circuit group for performing a basic function and a second circuit group for performing a monitoring function. A message buffer provided for buffer-storing data to be output. The message buffer is divided into regions, each region being permanently associated with one of the circuit groups and is accessible only by the respective associated circuit group.

Abstract: A method and a system exchange data between a program-controlled device, in particular a microcontroller, and a logic circuit. A control signal is transmitted from the program-controlled device to the logic circuit along a first line. A bidirectionally usable, second line is placed in the dominant state by the logic circuit if a data transmission is to be made by the logic circuit.

Abstract: An apparatus for activating and/or deactivating a security device, particularly an entry device for a motor vehicle, having a portable transmitter unit for wirelessly transmitting a coded information item which is received by a receiver apparatus and is compared with a prescribed coded information item, the receiver apparatus being capable of outputting an actuation signal to the security device if the two coded information items match, and wherein the codes of the transmitter unit and the receiver apparatus can be updated in terms of the currently coded information items to prevent unauthorized use of the motor vehicle.

Abstract: An invention relates to an apparatus for activating and/or deactivating a security device, particularly an entry device for a motor vehicle, having a portable transmitter unit for wirelessly transmitting a coded information item which is received by a receiver apparatus and is compared with a prescribed coded information item, the receiver apparatus being capable of outputting an actuation signal to the security device if the two information items match, and the receiver apparatus being connected to a mechanical device for operating the security device. In an apparatus in which unauthorized deactivation of the security device is reliably prevented, the receiver apparatus is disabled for the reception and/or evaluation of the coded information items and/or for the output of the actuation signal to the security device after the security device has been mechanically activated, the block being lifted after the security device has been mechanically deactivated.

Abstract: An improved receiver (5) of a remote control system, in particular for closing systems of a motor vehicle, and a method for operating such a remote control system are proposed. Modern motor vehicle closing systems are equipped with remote control systems which, in addition to the central locking of the doors, also perform so-called comfort functions such as the closing of the windows or of the sunroof. For safety reasons, such a comfort function must be terminated as soon as a signal fails to be received. If the remote control system is activated at the limit of its range, the response threshold of the receiver (5) may be undershot as a result of the transmitter (1) moving. This leads to undesired breaking off of the comfort function, or to jerky operation of the comfort function. According to the invention, it is therefore proposed to implement the response threshold of the receiver so that it is capable of being switched over.