S. N. Ishak, J. Sampe, N. A. Nayan, and Z. Yusoff, “A Fast Digital Phase Frequency Detector with Preset Word Frequency Searching in ADPLL for a UHF RFID Reader”, Eng. Technol. Appl. Sci. Res., vol. 12, no. 5, pp. 9379–9387, Oct. 2022.