A linearized amplifier using self-mixing feedback technique

IEICE Electronics Express

Dong-Ho Lee¹ 

[1] Department of Information and Communication Engineering, Hanbat National University

关键词: amplifiers;    linearity;    intermodulation;    cancellation;    feedback;    second harmonic;   

DOI  :  10.1587/elex.11.20140084

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)A linearized amplifier using self-mixing feedback technique is presented to cancel out third-order intermodulation distortion (IMD3) terms. Second harmonic terms, which are generated by the self-mixing mixer between base and collector of a BJT amplifier, can be used as a source for IMD3 cancellation. The amplifier is based on a common emitter BJT amplifier with a passive FET mixer and an emitter follower for self-mixing feedback. The amplifier has been implemented with discrete transistors on an FR-4 PCB. Up to 16-dB IMD3 rejection has been achieved by the self-mixing feedback technique at 2GHz with peak output power of 20dBm.

【 授权许可】

Unknown