Low-Power Continuously-Calibrated Clock Recovery Circuit for UHF RFID EPC Class-1 Generation-2 Transponders IEEE Journal of Solid-State Circuits (JSSC) 2010 作者：C. F. Chan, K. P. Pun, K. N. Leung, J. Guo, L. L. K. Leung, and C. S. Choy