Communicating with an implanted wireless sensor
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专利名称：Communicating with an implanted wireless sensor
发明人：DONALD MILLER,MICHAEL ELLIS,JASON KROH,MARK ALLEN
申请号：AU2006220733
申请日：20060306
公开号：AU2006220733A1
公开日：
20060914
专利内容由知识产权出版社提供
摘要：The present invention determines the resonant frequency of a sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency or set of frequencies and a predetermined amplitude. The energizing signal is coupled to the sensor via magnetic coupling and induces a current in the sensor which oscillates at the resonant frequency of the sensor. The system receives the ring down response of the sensor via magnetic coupling and determines the resonant frequency of the sensor, which is used to calculate the measured physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal.
申请人：CARDIOMEMS, INC.
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