Blair Erbstoeszer;Lorin W. Matthews;William E. Reagor;Karl Gauglitz;Mark Rutzer;Thomas M. Bocek
发明人:
Karl Gauglitz,Thomas M. Bocek,Mark Rutzer,Lorin W. Matthews,William E. Reagor,Blair Erbstoeszer
申请号：
US13282968
公开号：
US08710826B2
申请日:
2011.10.27
申请国别(地区):
US
年份:
2014
代理人:
摘要：
Systems and methods for sensing external magnetic fields in implantable medical devices are provided. One aspect of this disclosure relates to an apparatus for sensing magnetic fields. An apparatus embodiment includes a sensing circuit with at least one inductor having a magnetic core that saturates in the presence of a magnetic field having a prescribed flux density. The apparatus embodiment also includes an impedance measuring circuit connected to the sensing circuit. The impedance measuring circuit is adapted to measure impedance of the sensing circuit and to provide a signal when the impedance changes by a prescribed amount. According to an embodiment, the sensing circuit includes a resistor-inductor-capacitor (RLC) circuit. The impedance measuring circuit includes a transthoracic impedance measurement module (TIMM), according to an embodiment. Other aspects and embodiments are provided herein.
