A CMOS Voltage Reference Based on Mutual Compensation of Vtn and Vtp. - Ze-kun Zhou; Pei-Sheng Zhu; Yue Shi 001; Hui-ying Wang; Ying-qian Ma; Xiang-zhu Xu; Lin Tan 009; Xin Ming; Bo Zhang 027 (IEEE Trans. Circuits Syst. II Express Briefs, 2012)