Circuit configuration for monitoring the final stages of a plura

Details Circuit configuration for monitoring the final stages of a plura Circuit configuration for monitoring the final stages of a plura

1990-07-27

1992-03-24

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of electrically operated apparatus

324418, 340644, G01R 3114

Patent

active

050991981

ABSTRACT:
A circuit configuration for monitoring the final stages of a plurality of valves, particularly the power transistors (LT1-LT4) and their circuitry, for defects as well as for leakage currents or by-path currents comprises a comparator circuit (1), an OR-link (2) and of a further comparator element (XOR4). By way of the monitoring circuit, the actuation connections (S1-S4) of electromagnetically operable valves are connected to a sole output (A3). By applying short test pulses to the actuation inputs (E1-E4) of the final stages (LT1-LT4) and by comparing the signal variation at the output (A3) with the test pulse variation defects, leakage currents and the like are detected.

REFERENCES:
patent: 2902642 (1959-09-01), Voegtlen
patent: 3924178 (1975-12-01), Lockyer et al.
patent: 4173031 (1979-10-01), Leichle
patent: 4628268 (1986-12-01), Matsubara
patent: 4692697 (1987-09-01), Bray
patent: 4961051 (1990-10-01), Tjebben

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