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.

Abstract: A wireless powering and communication system is provided that includes a base unit, and an external unit that is separate from the base unit, where the base unit includes a single transducer circuit configured for uplink data communication to the external unit, where the transducer circuit is configured for power recovery from the external unit, a multiplexer circuit, a power recovery and conditioning circuit, a controller circuit, and a communication circuit, where the multiplexer circuit is configured to decouple power and data paths to enable operation with the single transducer circuit, the power recovery and conditioning circuit is configured to recover and optionally store power from power received by the single transducer circuit, the power recovery and conditioning circuit is configured to power the controller circuit and the communication circuit, the controller circuit is configured to control the multiplexer circuit, the communication circuit is configured to provide data to the multiplexer circuit

Abstract: A wireless powering and communication system is provided that includes a base unit, and an external unit that is separate from the base unit, where the base unit includes a single transducer circuit configured for uplink data communication to the external unit, where the transducer circuit is configured for power recovery from the external unit, a multiplexer circuit, a power recovery and conditioning circuit, a controller circuit, and a communication circuit, where the multiplexer circuit is configured to decouple power and data paths to enable operation with the single transducer circuit, the power recovery and conditioning circuit is configured to recover and optionally store power from power received by the single transducer circuit, the power recovery and conditioning circuit is configured to power the controller circuit and the communication circuit, the controller circuit is configured to control the multiplexer circuit, the communication circuit is configured to provide data to the multiplexer circuit

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.