Implantable device
First Claim
Patent Images
1. An implantable device comprising:
- a moveable member;
a processor;
an actuator configured to move the movable member in discrete amounts responsive to a control signal from the processor;
an antenna coil;
an RF-to-DC converter coupled to the antenna coil to convert received RF energy to a DC voltage; and
an oscillator coupled to the actuator and to the RF-to-DC converter so as to frequency modulate a load on the RF-to-DC converter responsive to activation of the actuator.
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Accused Products
Abstract
An implantable device comprising: a stepper motor; a moveable member, moveable by the stepper motor; and an oscillator, wherein the oscillator is influenced by a signal derived from or supplied to the stepper motor to enable information on the moveable member to be fedback to an external controller by passive telemetry.
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Citations
20 Claims
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1. An implantable device comprising:
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a moveable member; a processor; an actuator configured to move the movable member in discrete amounts responsive to a control signal from the processor; an antenna coil; an RF-to-DC converter coupled to the antenna coil to convert received RF energy to a DC voltage; and an oscillator coupled to the actuator and to the RF-to-DC converter so as to frequency modulate a load on the RF-to-DC converter responsive to activation of the actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system comprising:
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an implantable device comprising; a moveable member; a processor; an actuator configured to move the movable member in discrete amounts responsive to a control signal from the processor; an antenna coil; an RF-to-DC converter coupled to the antenna coil to convert received RF energy to a DC voltage; and an oscillator coupled to the actuator and to the RF-to-DC converter so as to frequency modulate a load on the RF-to-DC converter responsive to activation of the actuator; and an external controller comprising; an RF generator; an AM modulator configured to modulate a RF signal from the RF; a coil antenna for transmitting the modulated RF signal; circuitry for providing a signal responsive to an amount of RF energy coupled to the implantable device; an FM demodulator for demodulating the signal; and a processor coupled to the AM modulator for controlling the modulation of the RF signal and coupled to the FM demodulator for monitoring operation of the implantable device.
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16. A method for operating an implanted device having an actuator that positions a movable member in discrete steps, the method comprising:
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providing RF energy to the implanted device; modulating an amount of the RF energy absorbed by the implanted device; changing the modulation responsive to operation of the moving the actuator a discrete step; detecting the change in the modulation of the absorbed RF energy; and determining a position of the actuator responsive to the detected changes in modulation. - View Dependent Claims (17, 18, 19, 20)
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Specification