Dynamic reconfiguration for maximizing the overall link efficiency of energy receivers in a reliable implantable system
First Claim
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1. A system for providing power to an implanted receiver, the system comprising:
- 1) an acoustic transmitter configured to provide acoustic radiation having an acoustic frequency f;
2) a receiver unit configured to be implanted into a biological subject, wherein the receiver unit is configured to receive the acoustic radiation and to be powered by the acoustic radiation;
wherein the receiver unit comprisesi) an acoustic transducer configured to receive the acoustic radiation and to provide an input electrical AC signal;
ii) an adaptively reconfigurable electrical impedance matching network configured to receive the input electrical AC signal and to provide an output electrical AC signal, wherein the electrical impedance matching network is capacitive without including any inductors;
iii) an electrical load; and
iv) a power recovery circuit configured to receive the output electrical AC signal and to provide DC power to the electrical load; and
3) a system controller;
wherein the system controller is configured toa) alter one or more controlled system parameters including the acoustic frequency f, andb) alter a configuration of the adaptively reconfigurable electrical impedance matching network,responsive to changes in one or more system variables to control power delivery from the acoustic transmitter to the electrical load.
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Abstract
Efficient power transmission from an acoustic transmitter to an electrical load on an implanted device is provided using a control system that at least varies the transmitted acoustic frequency. Varying the transmitted frequency can change the electrical impedance of the acoustic transducer in the receiver that receives power from the transmitter. This ability to vary the transducer impedance can be used to optimize power delivery to the load.
15 Citations
22 Claims
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1. A system for providing power to an implanted receiver, the system comprising:
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1) an acoustic transmitter configured to provide acoustic radiation having an acoustic frequency f; 2) a receiver unit configured to be implanted into a biological subject, wherein the receiver unit is configured to receive the acoustic radiation and to be powered by the acoustic radiation; wherein the receiver unit comprises i) an acoustic transducer configured to receive the acoustic radiation and to provide an input electrical AC signal; ii) an adaptively reconfigurable electrical impedance matching network configured to receive the input electrical AC signal and to provide an output electrical AC signal, wherein the electrical impedance matching network is capacitive without including any inductors; iii) an electrical load; and iv) a power recovery circuit configured to receive the output electrical AC signal and to provide DC power to the electrical load; and 3) a system controller; wherein the system controller is configured to a) alter one or more controlled system parameters including the acoustic frequency f, and b) alter a configuration of the adaptively reconfigurable electrical impedance matching network, responsive to changes in one or more system variables to control power delivery from the acoustic transmitter to the electrical load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification