IMPLANTABLE MEDICAL DEVICE CHARGING
First Claim
Patent Images
1. A method comprising:
- providing a first signal to a primary coil that is inductively coupled to a secondary coil of an implantable medical device;
determining a first alignment difference between a voltage corresponding to the first signal and at least one of a current corresponding to the first signal and a component voltage at a component of a primary coil circuit;
determining a frequency sweep range based on the first alignment difference; and
performing a frequency sweep over the frequency sweep range.
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Abstract
A particular method of providing power to an implantable medical device includes providing a first signal to a primary coil that is inductively coupled to a secondary coil of an implantable medical device. The method also include determining a first alignment difference between a voltage corresponding to the first signal and at least one of a current corresponding to the first signal and a component voltage at a component of a primary coil circuit. The method further includes determining a frequency sweep range based on the first alignment difference. The method also includes performing a frequency sweep over the frequency sweep range.
34 Citations
27 Claims
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1. A method comprising:
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providing a first signal to a primary coil that is inductively coupled to a secondary coil of an implantable medical device; determining a first alignment difference between a voltage corresponding to the first signal and at least one of a current corresponding to the first signal and a component voltage at a component of a primary coil circuit; determining a frequency sweep range based on the first alignment difference; and performing a frequency sweep over the frequency sweep range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device comprising
a primary coil coupled to a circuit and operable to inductively couple to a secondary coil within an implantable medical device to transfer energy to the secondary coil within the implantable medical device responsive to a signal of the circuit; -
a sensing system coupled to the circuit, the sensing system operable to detect an indication of an alignment relationship between a voltage corresponding to the signal and at least one of a current corresponding to the signal and a component voltage at a component of the circuit; and a control system responsive to the sensing system, the control system operable to determine a frequency sweep range based on the alignment relationship and to cause the primary coil to receive the signal having a frequency within the frequency sweep range during the transfer of the energy. - View Dependent Claims (20, 21, 22)
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23. An implantable medical device comprising:
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a secondary coil coupled to a circuit and operable to inductively couple to a primary coil to receive energy from the primary coil; a battery charging system coupled to the secondary coil and operable to receive a current from the secondary coil and to apply a charging voltage to a battery responsive to the current; and a measurement system coupled to the circuit and operable to measure an electrical property of the circuit and to output information indicative of a value of the electrical property; wherein the secondary coil receives a charging signal from the primary coil, and wherein a frequency of the charging signal is determined based on the information indicative of the value of the electrical property and based on a detected alignment relationship between a voltage corresponding to a signal applied to the primary coil and at least one of a current corresponding to the signal and a component voltage at a component associated with the primary coil. - View Dependent Claims (24, 25, 26, 27)
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Specification