A CMOS OTA with extremely large DC open-loop voltage gain

IEICE Electronics Express

Yang Zhao¹  Zhangming Zhu¹  Haoyu Zhuang¹  Huaxi Gu²  Liang Liang¹  Yintang Yang¹ 

[1] School of Microelectronics, Xidian University;School of Telecommunications Engineering, Xidian University

关键词: CMOS OTA;    amplifier;    gain boosted;   

DOI  :  10.1587/elex.10.20130242

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(4)The DC open-loop voltage Gain is a very important specification for amplifiers. In order to increase this specification, in this paper, we have proposed an improved folded cascode gain boosted amplifier (improved FCGBA) which has extremely large DC open-loop voltage gain. Compared to traditional FCGBA, this novel structure needs only one auxiliary amplifier, so it is energy saving. Finally, with SMIC 0.18µm CMOS process of 1.8V supply and Hspice simulator, a corresponding amplifier with a capacitor load of 1.6pF is designed. Its voltage gain is 153dB; unit gain bandwidth is 1.91GHz; phase margin is 64°; 0.01% settling time is 2.36ns; and the power dissipation is only 12.9mW. This result confirms the validity of this new structure.

【 授权许可】

Unknown