Implementation of a 2.45GHz Passive RFID Transponder Chip in 0.18 mu m CMOS
In this paper, a passive 2.45GHz band RFID transponder chip for high data rate communication and with low power consumption has been presented. The passive transponder chip contains five parts: a voltage multiplier converts received RE signal to the DC power supply, a mode selector decides the operating status, a low power dissipation LC-tank voltage control oscillator, a 32-bit read only memory, and a modulator. The RF-to-DC circuit can generate the required power supply and bias voltages from received 2.45GHz RF signal with 250mV amplitude. The data stored in 32-bit ROM can modulate the 2.45GHZ carrier generated by VCO at up to 153Mbps for backscattering the data. The chip was designed and implemented by using TSMC 0.18 mu m 1P6M CMOS process. The chip area is 905 mu m x 652 mu n with simulated power consumption less than 4mW. The measurement and simulation results are well matched.
passive rfid transponder ask lc-tank vco