| 摘要 |
PCT No. PCT/DE95/00854 Sec. 371 Date Jul. 25, 1997 Sec. 102(e) Date Jul. 25, 1997 PCT Filed Jun. 30, 1995 PCT Pub. No. WO96/02982 PCT Pub. Date Feb. 1, 1996A device for supplying the on-board system voltage in a bus coupler without a repeater, for coupling to an information and power carrying bus of a bus system, in particular for building systems management. The device includes a coupling circuit having a control input connected to a triggering circuit having inputs for a control criterion. The coupling circuit operates as a constant current source at communications frequencies and as a control circuit together with a triggering circuit at lower frequencies, such as those caused by power consumption. The coupling circuit is effectively connected in series with a reservoir capacitor for tapping the on-board system voltage. The series connection is effectively connected to the bus drivers.
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