A 4.2-to-5.6 GHz Transformer-Based PMOS-only Stacked-gm VCO in 28-nm CMOS. - Mingkang Zhang; Zihao Zhu; Yueduo Liu; Zehao Zhang; Rongxin Bao; Jiahui Lin; Haovu Zhuang; Jiaxin Liu; Xiong Zhou; Shiheng Yang; Qiang Li 021 (ICTA, 2022)