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A Time Dependent Temperature Compensated Limiter for Passive Differential UHF RFID

In this paper a novel integrated circuit multistage limiter featuring temperature compensation and time dependent limitation for passive differential UHF RFID frontends is proposed. It consists of negative temperature coefficient DC limiting and two time variant positive temperature coefficient AC limiting circuits. Simulations with a 55nm process from Globalfoundries (GF55LPe) showed a low DC voltage variation of 74.1mV with respect to temperature and power as well as an increase of the voltage modulation depth at 20dBm input power of 720.1mV compared to a non time dependent limitation.