| 摘要 |
The aim of the invention is to make a device terminal (202; PA_SPK-, PA_SPK+) of an electronic device (200; 300; 400; 410), in particular for a motor vehicle, resistant to short-circuits, even a short-circuit with respect to an offset voltage which exceeds the operating voltage (Vbb), said terminal being designed for an external connection, preferably for connecting to a load (RL). This is achieved by a protective circuit (204; 304; 403; 411) for overvoltage and/or overcurrent protection, comprising a comparison stage (SPR1) for comparing a measurement voltage, which is formed from a voltage applied to the external connection, with a comparison voltage, in particular with a supply voltage or a voltage obtained therefrom of the electronic device (200; 300; 400; 410), and at least one switching element (UPR1, UPR2), which is arranged in series between the device terminal (202; PA_SPK-, PA_SPK+) and the external connection and which can be controlled by the comparison stage (SPR1), for separating the external connection from the device terminal (202; PA_SPK-, PA_SPK+). |
