| 摘要 |
The invention relates to a bus-driver circuit which, in the event of a short-circuit of a line of a two-conductor bus system, enables data that can be reliably identified by modules on the bus line to be introduced onto the bus. Said bus driver circuit consists of several electrically controlled switches (S1,..., S5), which form an H-bridge configuration. One switch (S1,..., S5) is provided in each of the five H-bridge branches. The two bus lines (L1, L2) are each connected to an end (1, 2) of the cross-branch of the H-bridge. The individual switches (S1,..., S4) in the longitudinal branches of the H-bridge can be switched into at least two positions (0, I, II), which are at different voltage levels (U1, U2, U3, U4).
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