Abstract: In a device for access control, the authorizations are stored on tickets in the form of a barcode. A reader unit is connected to an evaluating unit and controls devices that signal and/or block access. The reader unit has an insertion zone for a ticket wherein the insertion zone is larger than a ticket dimension. A multidirectional laser scanner scans the entire insertion zone in several lines oriented at an oblique angle relative to one another. The device can be used with different ticket formats such as air-travel tickets and check cards.

Abstract: In a device for access control, the authorizations are stored on tickets in the form of a barcode. A reader unit is connected to an evaluating unit and controls signalling means and/or blocking means for an access.

Abstract: An output circuit in which both the signal type (i.e., current or voltage) as well as the signal level range (for example, 0 to 10 V, -10 V to +10 V) are based on user input parameters. The circuit is integrated in an application-specific integrated circuit (i.e., ASIC).

Abstract: The present invention relates to an output driver circuit and in particular, an analog output driver circuit. Up to now, relays have been used in such driver circuits for the switching the outputs from output terminals (e.g., to ground) in the event of surges in the supply voltage. In accordance with the present invention, the relay is replaced by an electronic output switch element which has, free of control, a well-defined switch behavior. The output switch element is preferably a self-conducting field-effect transistor one connection of which is connected to the output line while its other connection is connected to ground.