A transconductance enhancement technique for bulk-driven OTAs working in weak inversion

IEICE Electronics Express

Xiao Zhao¹  Shuangshuang Cheng¹  Qisheng Zhang¹ 

[1] School of Geophysics and Information Technology, China University of Geosciences (Beijing)

关键词: transconductance enhancement;    bulk-driven;    weak inversion;    positive feedback differential pair;    OTA;   

DOI  :  10.1587/elex.13.20160475

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(10)A proposed transconductance enhancement technique for bulk-driven OTAs working in weak inversion is presented in this paper. The basic idea is to use a bulk-driven input differential pair employing the auxiliary amplifier and positive feedback technique to enhance transconductance, which improves the enhancement ratio of transconductance from (n + 1)/(n �? 1) to (n + 2)/(n �? 1). The proposed amplifier based on the mentioned technique is simulated on UMC 180 nm process with the help of Spectre. The simulation results demonstrate that the transconductance of the bulk-driven OTAs working in weak inversion improves almost 50% with just a little increased power consumption compared to the conventional counterparts.

【 授权许可】

Unknown