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This paper presents a sub-nanowatt front-end amplifier for ultra-low-power wireless IoT sensor nodes. This chip consists of an instrumentation amplifier, a DC servo loop, a clock generator and a bias circuit. It is fully integrated, and therefore does not rely on any off-chip references. Fabricated in 65nm CMOS process, measurement results show that the amplifier system achieves 39dB gain and 0.1–130Hz...
This paper discusses the design of a battery-less wirelessly-powered UWB system-on-a-chip (SoC) tag for area-constrained localization applications. An antenna-rectifier co-design methodology optimizes sensitivity and increases range under tag area constraints. A low-voltage (0.8-V) UWB TX enables high rectifier sensitivity by reducing required rectifier output voltage. The 2.4GHz rectifier, power-management...
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