Method for switching over a reference voltage potential for...

Details Method for switching over a reference voltage potential for... Method for switching over a reference voltage potential for...

2006-05-30

2006-05-30

Vu, Phuong T. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C361S056000, C361S091100, C361S111000, C361S118000

Reexamination Certificate

active

07054124

ABSTRACT:
Method for supplying a circuit unit (201) which is to be supplied with different supply voltages, in which the circuit unit (201) to be supplied is protected against overvoltages, having the following steps: application of at least two supply voltages (203a, 203b) with respect to a ground potential (210) to the circuit unit (201) to be supplied; connection of signal connections (208, 209) of the circuit unit (201) to signal lines (206, 207) for transmission of signals between the circuit unit (201) and external circuit units; emission of a reference voltage (204) from a control connection (212) of the circuit unit (201) to an overvoltage protective device (205), in that a supply voltage (203a, 203b) is passed on to the control connection (212) by means of a switching module (211); and tripping of the overvoltage protective device (205) on detection of an overvoltage which occurs with respect to the reference voltage (204) on at least one of the two signal lines (206, 207).

REFERENCES:
patent: 5280455 (1994-01-01), Kanaishi
patent: 5596637 (1997-01-01), Pasetti et al.
patent: 6172864 (2001-01-01), Bremond et al.
patent: 0 622 943 (1993-04-01), None
patent: 0 798 910 (1997-10-01), None
patent: 06054356 (1994-02-01), None
patent: WO 99/290098 (1999-06-01), None

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