Detection circuit arrangement for faulty levels of digital signals injected in a bus

摘要

The invention relates to a circuit arrangement for the detection of faulty levels of digital signals which are injected by at least one driver component, which is activated by data signals, into a bus line (15), wherein a decoupling unit is inserted between the relevant driver component and the bus line (15). For immediate detection of a functional fault in a driver component (13) and for identification of the latter, the output signal (A1) of each driver component (12, 52, 72) is combined in an exclusive-OR operation with the data signal (D1) to form an auxiliary signal (H), which is combined in an AND-operation with a release signal (E1) to form a fault signal (F1), which indicates a faulty level. IMAGE