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This work presents a 9.2 μA fully-passive sensor tag in 0.13 μm CMOS for biomedical research and human health monitoring. The sensor tag includes a 260 nA temperature-compensated 3 MHz reference oscillator. Subthreshold tag logic consumes 6μA from the 0.7 V supply. A 1.2 μA fully-differential chopper-stabilized amplifier with 1.25 μVrms input-referred noise is integrated for sensor interfacing. The...
Biosensors present exciting opportunities in novel medical and scientific applications. However, sensor tags presented to date cannot interface with practical sensors, lack addressability, and/or require a custom (high-cost) interrogator. Our tag provides these features via ultra-low-power circuitry including a low-noise biosignal amplifier, unique tag ID generator, calibration-free 3 MHz oscillator,...
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