An Review of Harmonic Suppression Methods for Multilevel Power Amplifiers in High Precision Applications 
WEI Jian, LIU Chen, GUO Zhichao, ZHAO Xiaokun, WANG Weinan, ZHANG Jiawei
Journal of Northeast Electric Power University . 2025, (2): 22 -31 .  DOI: 10.19718/i.issn.1005-2992.2025-02-0022-10