Zhang Y, You Y, Ren W, Xu X, Shen L, Ru J, HUANG R, Ye L. 3.8 A 0.954nW 32kHz Crystal Oscillator in 22nm CMOS with Gm-C-Based Current Injection Control, in 2023 IEEE International Solid- State Circuits Conference (ISSCC).; 2023:68-70.