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An ultrasonic array system is designed for wirelessly powering and communicating with implantable medical devices. A flexible hardware interface is used to drive a 32-element linear phased array with emphasis on programmability and efficiency rather than bandwidth or peak power. Various beam patterns and data modulation schemes are verified at a depth of 6 cm in a tissue phantom with more than sufficient...
This paper presents the first fully ultrasonic (US) high-precision implantable sensor with active US links for power-up, data downlink, and data uplink. The packaged implant measures just 1.7×2.6×8.1mm3 and includes a custom IC, piezoelectric devices (piezos) designed for data/power links, and a pressure transducer (PT). Characterization is performed at a large depth of 12 cm, in a phantom material,...
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