CIRCUIT, SYSTEM AND METHOD FOR FAR-FIELD RADIATIVE POWERING OF AN IMPLANTABLE MEDICAL DEVICE
First Claim
1. An isolated circuit comprising:
- a RF input configured to receive a far field radiative powering signal;
a rectified voltage output configured to provide a rectified voltage based on the received far field radiative powering signal;
a first power assembly comprising a first impedance coupled to the RF input, the first impedance provided, at least in part, by activating a first switch in response to the rectified voltage satisfying a first voltage threshold; and
a second power assembly comprising a second impedance coupled to the RF input, the second impedance provided, at least in part, by activating the first switch and a second switch in response to the rectified voltage satisfying the first voltage threshold and a second voltage threshold, respectively.
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Accused Products
Abstract
An isolated circuit including a RF input configured to receive a far field radiative powering signal and a rectified voltage output configured to provide a rectified voltage based on the received far field radiative powering signal. The isolated circuit also includes a first power assembly comprising a first impedance coupled to the RF input where the first impedance is provided, at least in part, by activating a first switch in response to the rectified voltage satisfying a first voltage threshold. The isolated circuit also includes a second power assembly comprising a second impedance coupled to the RF input where the second impedance is provided, at least in part, by activating the first switch and a second switch in response to the rectified voltage satisfying the first voltage threshold and a second voltage threshold, respectively.
46 Citations
20 Claims
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1. An isolated circuit comprising:
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a RF input configured to receive a far field radiative powering signal; a rectified voltage output configured to provide a rectified voltage based on the received far field radiative powering signal; a first power assembly comprising a first impedance coupled to the RF input, the first impedance provided, at least in part, by activating a first switch in response to the rectified voltage satisfying a first voltage threshold; and a second power assembly comprising a second impedance coupled to the RF input, the second impedance provided, at least in part, by activating the first switch and a second switch in response to the rectified voltage satisfying the first voltage threshold and a second voltage threshold, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An implantable medical device, comprising:
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an antenna; a matching network coupled to the antenna, the antenna and the matching network together configured to receive a far field radiative powering signal, the matching network configured to provide a matching impedance to the antenna; a voltage rectifier coupled to the matching network, the voltage rectifier configured to rectify the received far field radiative powering signal and to output a rectified voltage based on the received far field radiative powering signal; and an impedance feedback circuit configured to adjust the matching impedance of the matching network based on the rectified voltage. - View Dependent Claims (14, 15, 16, 17)
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18. An antenna assembly, comprising:
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a receiving element configured to receive a far field powering signal; a load coupled to the receiving element, the load having a load impedance that varies non-linearly with variations in the far field powering signal, the load comprising; a matching network coupled to the receiving element; a voltage rectifier coupled to the matching network, the voltage rectifier configured to output a rectified voltage based on the received far field radiative powering signal; an impedance feedback circuit configured to receive the rectified voltage from the voltage rectifier, the impedance feedback circuit configured to activate a first switch when the rectified voltage reaches a first rectified voltage threshold and to activate a second switch when the rectified voltage reaches a second rectified voltage threshold, the first switch configured to couple a first impedance to the load to adjust the load impedance when the first switch is activated, the second switch is configured to couple a second impedance to the load to adjust the load impedance when the second switch is activated. - View Dependent Claims (19, 20)
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Specification