Piezoelectric transducer
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United States of America Patent
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Oct 2, 2012
Grant Date -
Jul 21, 2011
app pub date -
Mar 30, 2011
filing date -
Dec 30, 1997
priority date (Note) -
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Abstract
Devices and systems for transmitting information within a body are disclosed. An example system includes a signal generator configured for transmitting an acoustic interrogation signal, a sensor for sensing at least one parameter within the body and generating an electrical sensor signal, an acoustic transducer coupled to the sensor and configured to convert a received acoustic interrogation signal into an electrical signal, and a switching element adapted to modulate a reflected acoustic wave from the acoustic transducer based on the electrical sensor signal. The switching element is configured to controllably change the mechanical impedance of the acoustic transducer based a parameter of the electrical sensor signal, such as frequency.
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