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System and method for monitoring operation of switch elements

  • US 8,766,490 B2
  • Filed: 03/25/2011
  • Issued: 07/01/2014
  • Est. Priority Date: 03/25/2011
  • Status: Expired due to Fees
First Claim
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1. A system for monitoring operation of a circuit having a DC power supply, a load, and a switch element connecting the DC power supply to the load, the system comprising:

  • a sensor element having a first input node, a second input node, and an output node;

    a capacitive element coupling the first input node of the sensor element to a first interconnection node of the circuit between a first voltage supply terminal of the DC power supply and the load; and

    a grounding structure coupling the second input node of the sensor element to a ground plane that is galvanically isolated from the DC power supply, wherein the grounding structure is positioned with respect to a second interconnection node of the circuit between a second voltage supply terminal of the DC power supply and the load so as to define a stray capacitance for carrying a transient signal resulting from an opening or closing of the switch element.

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