Passive voice enabled rfid devices
作者： Ray Wang
DOI:
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摘要: Passive voice enabled RFID devices. The passive devices include a power harvesting circuit that converts natural and artificial energy sources to voltage current the device, thus, device does not require battery. It provides capable with is powered by from various or and/or such as: signals, other electromagnetic waves, sun light, vibrations, RF noise, etc. used signals received uniquely identify generator of sound signals.
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