Energy efficient resonant driving circuit for magnetically coupled interaction with an implantable medical device
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United States of America Patent
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Aug 2, 2016
Grant Date -
Feb 4, 2016
app pub date -
Oct 14, 2015
filing date -
Jul 16, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A driving circuit useful in a magnetic inductive coupling wireless communication system is disclosed. The circuit includes an inductor (coil) and capacitor in series selectively coupled to a power source such as a rechargeable battery. The LC circuit is made to resonate in accordance with a Frequency Shift Keying or other protocol. Such resonance produces a voltage across the inductor. This voltage is used to create a first voltage either by tapping into the coil, or by providing a transformer. The first voltage is coupled to the rechargeable battery by a diode. When the circuit resonates, and when the first voltage exceeds the voltage of the power source, the diode turns on, thus shunting excess current back to recharge the rechargeable battery. By use of this circuit, energy is conserved. Additionally, oscillations can be quickly dampened so as to allow the circuit to transmit at high data rates.
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