SYSTEM OF INJECTABLE FULLY-MONOLITHIC WIRELESS BIO-SENSING
Systems are provided for a wireless system-on-chip (SoC) with integrated antenna, power harvesting, and biosensors. An illustrative SoC can have a dimension of 200 μm×200 μm×100 μm to allow painless injection. Such small device size is enabled by: a 13 μm×20 μm 1 nA current reference, optical clock recovery, low voltage inverting dc-dc to enable use of higher quantum efficiency diodes, on-chip resonant antenna, and an array-scanning reader.
1 . A system-on-chip (SoC) sensing system, the system comprising:
a measurement reader having at least one reader antenna for transmitting a signal to a SoC, the measurement reader being not located on the SoC; and
the SoC comprising:
a receiving antenna for receiving the signal transmitted from the at least one reader antenna;
a power supply subsystem powered by the signal received by the receiving antenna, the power supply subsystem comprising a plurality of diodes;
a clock recovery subsystem powered by the signal received by the receiving antenna, the clock recovery system comprising a set of diodes; and
a sensor subsystem, the sensor subsystem generating a digital signal for modulating the signal transmitted by the measurement reader
2 . The system of claim 1 , wherein the sensor subsystem includes an electrochemical sensor.
3 . The system of claim 1 , wherein the sensor subsystem includes a light sensor.
4 . The system of claim 1 , wherein the sensor subsystem includes a capacitance sensor.
5 . The system of claim 1 , wherein the SoC has a dimension equal to or less than 200 μm×200 μm×100 μm.
6 . The system of claim 1 , wherein the SoC is injected into a skin at a depth ranging from about 1 mm to about 4 mm.
7 . The system of claim 1 , wherein the power supply include a charge pump.
8 . The system of claim 1 , wherein the SoC further comprising a current reference having a switched capacitor reference.
9 . The system of claim 1 , wherein the SoC further comprising a DC-to-DC low voltage converter.
10 . The system of claim 1 , wherein the signal transmitted by the measurement reader is an optical signal in a range of radio frequency.