Miniaturized electronic device ingestible by a subject or implantable inside a body of the subject
View Patent ↗A miniaturized in-body electronic device is provided. One or more antennas (e.g., 32 ) may be galvanically coupled to receive an alternating current (AC) signal through the body of a subject where the in-body electronic device is located. Power extraction circuitry (e.g., 36 ) is configured to extract electrical power from the AC signal received by the antenna. The extracted electrical power is used for electrically powering one or more components of the electronic device. A transmitter (e.g., 48 ) is coupled to receive power from the power extraction circuitry. A controller (e.g., 46 ) is coupled to the transmitter. The controller is configured to activate the transmitter to generate a sequence of intermittent transmission bursts for transmitting an uplink signal. A transmission burst may have a higher instantaneous power level than an instantaneous power level of the AC signal received by the antenna.
1. A miniaturized in-body electronic device comprising:
at least one dipole antenna configured to receive an AC signal sent via galvanic coupling through a body of a subject when the in-body electronic device is located therein, and also configured as oxidizing and reduction electrodes of an electrochemical battery when the in-body electronic device is exposed to internal gastric acid;
power extraction circuitry configured to extract electrical power from the at least one dipole antenna, the extracted electrical power being accumulated over a charging cycle;
a transmitter coupled to receive power from the power extraction circuitry; and
a controller coupled to the transmitter, wherein the controller is configured to activate the transmitter to generate a sequence of intermittent transmission bursts for transmitting an uplink signal.
2. The in-body electronic device of claim 1 , wherein the power extraction circuitry comprises an AC-to-DC converter and an energy storage device coupled to receive a DC signal from the AC-to-DC converter.
3. The in-body electronic device of claim 2 , wherein the power extraction circuitry further comprises a power level detector coupled to the energy storage device, the power level detector coupled to provide a signal to the controller indicative of an electrical charge status of the energy storage device.
4. The in-body electronic device of claim 3 , wherein the transmission burst occurs during a period of time when the charge status of the energy storage device meets or exceeds a charge threshold value.
5. The in-body electronic device of claim 1 , wherein the power extraction circuitry is configured to power the transmitter from an AC power input without an AC to DC converter.
6. The in-body electronic device of claim 5 , wherein a periodicity of the sequence of intermittent transmission bursts is determined by the frequency of the AC signal sent via galvanic coupling.
7. The electronic device of claim 1 , wherein a transmission of the uplink signal occurs contemporaneously with a reception of the AC signal sent via galvanic coupling.
8. The electronic device of claim 1 , wherein a transmission of the uplink signal is temporally spaced relative to a time of reception of the AC signal sent via galvanic coupling.
9. The electronic device of claim 1 further comprising at least a second antenna coupled to the transmitter to transmit the uplink signal.
10. The electronic device of claim 1 , wherein the uplink signal comprises a frequency higher than that of a downlink signal in response to receipt of which the controller is configured to direct transmission of the uplink signal.
11. The in-body electronic device of claim 1 , wherein said device comprises a semiconductor chip and said at least one dipole antenna is embedded in the chip.
12. The in-body electronic device of claim 1 , wherein the power level of the burst is higher than power instantaneously available from said at least one dipole antenna.