Abstract: A circuit arrangement for controlling access to a common memory by two or more processors, one of which is privileged, accelerates and simplifies the execution of the accesses by provision for each processor of its own address register and its own data register. As a result, a processor can process the data read during an access while the next access to the memory is already being carried out for another processor. In the case of write operations, the waiting times are reduced, notably for the non-privileged processors when a write operation is interrupted by a privileged processor, because the data to be written can then be transferred directly to the associated data register.

Abstract: A method and apparatus for processing identification signals in a data signal (teletext signal) which is cyclically repeated within a television signal and which can be displayed in the form of single still television pictures (teletext pages), whereby the manual entry of numbers for selecting the teletext pages is superfluous and the desired teletext pages can be selected in a simple and flawless way by searching a part of the teletext signal constituting at least a part of the contents of a selected teletext page for signal sequences representing three-digit, natural numbers, which sequences are separated as identification signals and are stored as signals assigned to the selected teletext page.

Abstract: An arrangement for the control and remote control of a battery driven apparatus is switched on and off upon the approach and withdrawal, respectively, of a user. The arrangement finds particular use in a water-rinsing system, which comprises an electrical adjustment member which can be activated upon the approach of the user. The apparatus transmits infrared detection pulses which are received again after reflection by the user. In response to the reflected pulses a control circuit (2) interrogates the measured charge state of the battery, conditions the adjustment member (7) to be switched on only if the battery (5) has a charge state such that the adjustment member can be switched off again, and transmits infrared state pulses instead of the detection pulses. The state pulses contain information about the charge state of the battery and can be received by an additional remotely located infrared reception unit (12) for evaluation.