Electrical transmission or interconnection systems – Switching systems – Condition responsive
Reexamination Certificate
2005-03-22
2005-03-22
Reichard, Dean A. (Department: 2831)
Electrical transmission or interconnection systems
Switching systems
Condition responsive
C174S100000, C307S125000, C307S147000, C307S407000, C307S056000, C307S082000, C307S058000, C307S080000
Reexamination Certificate
active
06870282
ABSTRACT:
Previously in a bus system, voltage signals were transmitted from the central unit to the modules, which could reply thereto by variation of the current input. A disadvantage thereby is the relatively high susceptibility to interference of the current input, which itself already must be kept relatively small due to the energy consumption, as well as the correspondingly high effort and expense for an error-free recognition of the signals transmitted from the modules in the central unit. It is now suggested, that the modules also answer to the central unit by means of voltage signals superposed on the direct supply voltage, whereby for the time duration of the signal transmission by the modules, the central unit provides the direct supply voltage to the bus line over a resistor, so that the voltage signal of the module can be detected in the central unit on the bus line on the side of the resistor facing away from the direct supply voltage. A preferred application for bus systems in motor vehicles, especially for a sensor data bus, is provided.
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Bischoff Michael
Deppe Ruediger
Fendt Guenter
Huber Thomas
Mueller Norbert
Lee Jinhee
Reichard Dean A.
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