Patent ID: 7932724
Filing Date: 2011-04-26
Classification: G01R

Abstract:
1. A circuit assemblage for checking a functionality of a power transistor, comprising: a power transistor having an insulated gate, a first power electrode configured as one of a drain or a collector, and a second power electrode configured as one of a source or an emitter, wherein the first and second power electrode are connected via a first power electrode terminal contact and a second power electrode terminal contact to a power circuit having a DC voltage source and an electrical DC load; a control application device having a signal output that is connected via a gate terminal contact to the insulated gate; a capacitance measuring device configured for measuring a gate terminal capacitance between the gate terminal contact and the second power electrode terminal contact; and an evaluation device configured for comparing the gate terminal capacitance measured by the capacitance measuring device with a gate capacitance and outputting a fault signal as a function of the comparison.