Motion sensor for implantable medical device

摘要

A sensor (200) and related method for multi-axial measurement of motion for an implantable medical device. The sensor (200) has a wide variety of applications, including use as a cardiac wall motion sensor or a physical activity sensor. The sensor (200) includes first and second conductors (208,210) over which the motion measurements are made. A first transducer (202) provides a first motion measurement indicative of sensor acceleration during a first phase, while a second transducer (204) provides a second motion measurement indicative of sensor acceleration during a second phase. The first and second transducers (202,204) are connected in parallel so as to provide the first and second motion measurements to an implantable medical device over the first and second conductors (208,210) . The first and second phases are non-overlapping periods of time so that the motion measurements from each transducer are time division multiplexed. <IMAGE>