Title :
A 13.56 MHz RFID transponder front-end with merged load modulation and voltage doubler-clamping rectifier circuits
Author :
Li, Yunlei ; Liu, Jin
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Richardson, TX, USA
Abstract :
A 13.56 MHz RF transponder front-end circuit was designed for RFID or wireless sensor applications using 0.35-μm CMOS technologies. It converts RF power to DC and extracts clock and data; a smartly positioned NMOS device implements load modulation for efficient data sending back. The new design merges the load modulation and voltage clamping into the voltage doubler rectifier circuits to achieve a longer operating distance. Simulation results show that the transponder operates over a wide range of electromagnetic field strength with induced voltage from 0.1 V to 10 V. The chip also generates a power-on reset (POR) signal for digital circuits. The low power analog blocks consume less than 1 μA current for the 0.1 V induced voltage.
Keywords :
CMOS integrated circuits; data communication; integrated circuit design; low-power electronics; mixed analogue-digital integrated circuits; modulation; radiofrequency identification; rectifiers; transponders; voltage multipliers; 0.1 to 10 V; 0.35 micron; 13.56 MHz; CMOS technologies; NMOS device; RF power; RFID transponder front-end; digital circuits; electromagnetic field strength; induced voltage; load modulation; low power analog blocks; operating distance; power-on reset signal; voltage clamping rectifier circuits; voltage doubler rectifier circuits; wireless sensor; CMOS technology; Circuits; Clocks; Data mining; Radio frequency; Radiofrequency identification; Rectifiers; Transponders; Voltage; Wireless sensor networks;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465780
