A 1.46-pJ/bit, 149-KF² RO TRNG Based on Reference-RO-Free Thresholding of Jitter Accumulation. - Haibiao Zuo; Qingsen Zhuang; Jiacheng Hao; Haochen Zhong; Xiaojin Zhao (IEEE Trans. Circuits Syst. II Express Briefs, 2025)