Abstract: A circuit arrangement, an image-sensor device, and a method are proposed, the streaking effect, in particular, being greatly reduced in a dark scene of an image sensor.

Abstract: A light sensor having increased sensitivity and improved reaction speed includes a phototransistor and a source-follower transistor as an impedance converter for a potential of a main electrode of the phototransistor, and a second transistor as a feedback element between the second main electrode of the phototransistor and its control electrode.

Abstract: A circuit arrangement of a video sensor chip has photosensitive pixels arranged in a matrix, each pixel having a phototransistor whose output photoelectric current is amplified logarithmically and sent as a voltage signal to an analyzer circuit.

Abstract: To improve a decay time of an image sensor that has a plurality of light sensor elements and to permit higher image repetition rates, where a first signal level representative of a light intensity is picked up by the light sensor element, the light sensor element is reset and then a resulting second signal level is picked up, an output of the light sensor element is initialized at a signal level, which is selected as a function of the first signal level picked up, before picking up the first signal level again.

Abstract: A system for testing a computer built into a control unit. A power supply unit is provided for the voltage supply for the control unit and the computer. In addition, the test result can be indicated by a device and/or means may be provided for shutting down the system regulated and/or controlled by the control unit. The control unit contains means that can bring the computer into certain operating modes. In addition, sensing means are provided that detect the current or voltage in the power supply circuit of the computer, whereupon the current or voltage detected is compared with at least one preset threshold value in comparator means. For actuation of the device and/or the cutoff, there are actuator means that indicate an error depending on the result of the comparison or cause all or part of the system to be shut down in reaction to such an error.