Wireless DC power Generator for Passive RFID by using Cockcroft-Walton Voltage Multiplier in CMOS 0.18um Technology

This paper presents a DC generator for passive RFID tag based on Cockcroft-Walton voltage multiplier topology. Generator has number of voltage multipliers in parallel. It includes bandgap-reference and regulator to create stably DC voltage to operate the tag's internal circuitry. And it has limiter circuit to prevent damage to the internal circuit when a strong signal is received. This DC generator designed to operate at UHF 900MHz and produces an output of about 1.8V for 30k-ohm when 0dBm intensity signal is received.