Self resonant transmitting device
A device for powering an implant within a body of a subject from a location external to the subject, wherein the implant requires a threshold rate of power increase in order to operate in at least one mode, may include an antenna configured to wirelessly transmit energy to the implant. The device may also include a power storage unit configured to store energy from a power source incapable of delivering the threshold rate of power increase to enable the implant unit to operate in the at least one mode and a power release unit configured to release a pulse of energy from the power storage unit to the antenna after the power storage unit collects an amount of energy sufficient to enable the implant unit to operate in the at least one mode.
1. A device for transmitting power from a location external to a body of a subject to an implant unit internal to the body of the subject, wherein the implant unit requires a threshold rate of power increase to operate in a modulation mode to modulate at least one nerve, the device comprising:
an antenna configured to be located external to a subject;
a power storage unit configured to store energy from a power source incapable of delivering the threshold rate of power increase to enable the implant unit to operate in the modulation mode;
a power release unit; and
at least one processor configured to control the power release unit, wherein
at least the antenna forms part of an external circuit having a resonance frequency, and
the power release unit is configured such that, when in a first state, the power storage unit receives power from the primary power source and, when in a second state, the power release unit releases a pulse of energy from the power storage unit to the antenna, the pulse of energy being sufficient to enable the implant unit to modulate the at least one nerve, and wherein the external circuit is configured to generate a signal for transmission to the implant unit by electrical oscillation in the external circuit at the resonance frequency of the external circuit when the pulse of energy is received by the external circuit.
2. The device of claim 1 , wherein the processor is configured to switch the power release unit from the first state to the second state to transmit such that the power delivered from the antenna to the implant unit is transmitted in the form of a pulse train.
3. The device of claim 1 , further comprising a resonance matching unit in electrical communication with the external circuit and configured to alter the resonant frequency of the external circuit.
4. The device of claim 3 , wherein the processor is configured to control the resonance matching unit to alter the resonant frequency of the external circuit based on a detected magnitude of power transmitted to the implant unit.
5. The device of claim 1 , further comprising a flexible substrate, and wherein a least a portion of the external circuit is disposed on the flexible substrate.