Circuit arrangement comprising a multi-wire line for...

Details Circuit arrangement comprising a multi-wire line for... Circuit arrangement comprising a multi-wire line for...

2004-07-20

2008-11-25

Dole, Timothy J (Department: 2831)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

C324S510000, C324S511000, C324S537000

Reexamination Certificate

active

07456635

ABSTRACT:
A circuit arrangement with a multi-wire line for supplying current to a sensor and for emitting a signal that corresponds to a measured value to an evaluation module via a signal line. To eliminate measuring errors caused by short circuits, first and second resistors, with the second resistor provided with a current tap, and a transistor, which is connected to a clock-pulse generator that bridges the first resistor in a clocked manner, are connected in series to the signal emission line. A comparator for comparing the values obtained via the resistors in the successive switching positions of the transistor and for emitting a short-circuit error message to the evaluation module, if the measured values differ in the successive clock pulses, is connected downstream of the resistors.

REFERENCES:
patent: 5294890 (1994-03-01), Hemminger et al.
patent: 7265955 (2007-09-01), Fink
patent: 28 09596 (1979-09-01), None

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