A low power clock generator with self-calibration for UHF RFID tags in intelligent terrestrial sensor networks.

A low power clock generator with self-calibration for UHF RFID tags compatible with the EPCglobal Class-1 Gen-2 (EPC Gen2) standard is presented. By utilizing the timing information of the reader to tag (R ⇒ T) link symbols, the frequency accuracy of the calibrated clock can meet the stringent requirement of the standard. Designed in a 0.18 μ m standard CMOS technology, simulation results show that the frequency error of the clock source is only from − 2.07 to + 1.4% of the target frequency of 2.56 MHz. The power consumption is only 720 nW. [ABSTRACT FROM AUTHOR]