Systems and methods for passive radio enabled power gating for a body mountable device

Abstract

Systems and methods for passive radio enabled power gating for a body mountable device are disclosed. In one embodiment, a system for power gating includes: a power supply; a Near Field Communication (NFC) antenna to receive NFC signals; a Radio Frequency (RF) rectifier electrically coupled to the NFC antenna to generate a current based on a signal received from the NFC antenna; and an electronic switch coupled between the power supply and a sensor, wherein the RF rectifier is further coupled to the switch to apply the current to the switch to change a state of the switch.

What is claimed: 
     
         1 . A wearable glucose sensor device comprising:
 a power supply;   a first antenna;   a radio frequency (RF) rectifier electrically coupled to the first antenna to generate a current based on a first signal received from the first antenna;   a sensor terminal adapted to electrically couple to a sensor;   a memory configured to store data received via the sensor terminal;   an electronic switch coupled between the power supply and the sensor to control electrical connection between the power supply and the sensor, wherein the RF rectifier is further coupled to the electronic switch to apply the current to the electronic switch to change a state of the electronic switch; and   a network interface coupled to the memory, the network interface activated by a second signal to transmit data stored in the memory to a remote device.   
     
     
         2 . The wearable glucose sensor device of  claim 1 , wherein the electronic switch comprises one or more of: a transistor, a relay, or an electronically controlled switch. 
     
     
         3 . The wearable glucose sensor device of  claim 1 , wherein the power supply comprises a battery. 
     
     
         4 . The wearable glucose sensor device of  claim 1 , further comprising a second antenna; and wherein the network interface is configured to receive the second signal from the second antenna. 
     
     
         5 . The wearable glucose sensor device of  claim 1 , wherein the electronic switch is further coupled between the power supply and a processor; and wherein the processor is coupled to the sensor terminal to receive sensor data from the sensor when the electronic switch is closed, and to the memory to store the sensor data in the memory. 
     
     
         6 . The wearable glucose sensor device of  claim 5 , wherein the processor receives a second current from the power supply when the electronic switch is closed. 
     
     
         7 . The wearable glucose sensor device of  claim 1 , wherein the network interface is coupled to the first antenna to transmit the data stored in the memory. 
     
     
         8 . The wearable glucose sensor device of  claim 1 , further comprising a second antenna and wherein the network interface is coupled to the second antenna to transmit the data stored in the memory using the second antenna, and wherein the second antenna is configured to transmit data using a different protocol than the first antenna. 
     
     
         9 . The wearable glucose sensor device of  claim 1 , wherein the network interface is configured to receive the second signal via the first antenna. 
     
     
         10 . A system for power gating for a wearable analyte sensor device comprising:
 a first antenna;   a radio frequency (RF) rectifier electrically coupled to the first antenna to generate a current based on a first signal received from the first antenna;   an analyte sensor;   a memory configured to store data received from the analyte sensor;   an electronic switch configured to control power to the analyte sensor, wherein the RF rectifier is coupled to the electronic switch and configured to apply the current to change a state of the electronic switch; and   an NFC-based network interface coupled to the memory, the NFC-based network interface activated by a second signal to transmit data stored in the memory to a remote device.   
     
     
         11 . The system of  claim 10 , wherein the electronic switch comprises one or more of: a transistor, a relay, or an electronically controlled switch. 
     
     
         12 . The system of  claim 10 , further comprising a second antenna; and wherein the NFC-based network interface is configured to receive the second signal from the second antenna. 
     
     
         13 . The system of  claim 12 , wherein the wearable analyte sensor device is configured to transmit data using the first antenna. 
     
     
         14 . The system of  claim 13 , further comprising a second antenna and wherein the wearable analyte sensor device is configured to transmit data using the second antenna, and wherein the second antenna is configured to transmit data using a different protocol than the first antenna. 
     
     
         15 . A wearable sensor device comprising:
 a first antenna;   a radio frequency (RF) rectifier electrically coupled to the first antenna to generate a current based on a first signal received from the first antenna;   a blood analyte sensor;   a memory coupled to the blood analyte sensor;   a network interface coupled to the memory;   a processor coupled to the blood analyte sensor, the processor to:
 store sensor data received from the blood analyte sensor in the memory; 
 upon receipt of a second signal via the network interface, transmit the stored sensor data to a remote device using the network interface; and 
   an electronic switch configured to control power to the blood analyte sensor, wherein the RF rectifier is coupled to the electronic switch and configured to apply the current to change a state of the electronic switch.   
     
     
         16 . The wearable sensor device of  claim 15 , wherein the electronic switch comprises one or more of: a transistor, a relay, or an electronically controlled switch. 
     
     
         17 . The wearable sensor device of  claim 15 , wherein the network interface is configured to receive the second signal from the first antenna. 
     
     
         18 . The wearable sensor device of  claim 15 , wherein the processor is configured to receive sensor data from the blood analyte sensor when the electronic switch is closed, and configured to store the sensor data in a memory. 
     
     
         19 . The wearable sensor device of  claim 15 , wherein the processor is coupled to the first antenna to transmit data using the first antenna. 
     
     
         20 . The wearable sensor device of  claim 15 , further comprising a second antenna and wherein the processor is coupled to the second antenna to receive the second signal and to transmit data using the second antenna, and wherein the second antenna is configured to transmit data using a different protocol than the first antenna.