Isscc 2010 / Session 2 / Mm-wave Beamforming & Rf Building Blocks / 2.8 2.8 a 9.2µa Gen 2 Compatible Uhf Rfid Sensing Tag with -12dbm Sensitivity and 1.25µv Rms Input- Referred Noise Floor

Passive RFID technology enables battery-free wearable and implantable sensors with an unlimited lifespan, small size, and sub-gram weight. These properties facilitate advanced biomedical research (such as untethered monitoring of freely-behaving insects and small animals) and unobtrusive human health monitoring. Passive sensor tags reported to date have employed simple ring oscillator temperature sensors with no protocol or addressability [1,2]. However, realistic applications demand accurate processing of μV-level biosignals and compatibility with industry standard RFID protocols.