We present a fully implantable subcutaneous continuous glucose monitoring (CGM) microsystem on CMOS platform.The proposed design incorporates electrochemical sensing technique using an ultra-low-power potentiostatic system. It is wirelessly powered through an inductive coupling link at 900MHz and supports bidirectional data communication with an external reader. A low-power potentiostat and a dual-slope ADC record the on-chip sensor signal. Pt and Ag/ AgCI on-chip electrodes are post-fabricated and functionalized in situ by glucose oxidase enzyme to enable glucose measurement. The 1.4x l.4xO.25mm 3 prototype fabricated in a 0.18f.1m CMOS technology was validated in glucose measurements. Total power consumption of the system is 6f.1W.
Abstract:We have experimentally demonstrated a reconfigurable silicon thermo-optical device able to tailor its intrinsic spectral optical response by means of the thermo-optical control of individual and uncoupled resonant modes of micro-ring resonators. Preliminarily results show that the device's optical response can be tailored to build up distinct and reconfigurable logic levels for optical signal processing, as well as control of overall figures of merit, such as free-spectral-range, extinction ratio and 3dB bandwidth. In addition, the micro-heaters on top of the ring resonators are able to tune the resonant wavelength with efficiency of 0.25 nm/mW within a range of up to 10 nm, as well as able to switch the resonant wavelength within fall and rise time of 15 μs.
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