Patent ID: 8209005
Filing Date: 2012-06-26
Classification: A61N

Abstract:
1. An apparatus for performing an impedance check of a high-voltage lead of an implantable medical device, said apparatus comprising: a high-voltage bridge adapted to be coupled to a high-voltage capacitor and the high-voltage lead, the high-voltage bridge comprising a thyristor having a gate, an isolating diode coupled to the gate of the thyristor, and an insulated gate bipolar transistor (IGBT); a multiplexer circuit coupled to the isolating diode and configured to route current through the isolating diode into the gate of the thyristor to perform an impedance check; a current limiter circuit coupled to the multiplexer circuit and configured to control a flow of the current into the multiplexer circuit; and a ground-referenced voltage source coupled to the current limiter circuit, the voltage source configured to provide triggering signals for the isolating diode and the IGBT and to provide current for performance of the impedance check.