An improved non-linear current recycling folded cascode OTA with cascode self-biasing

被引：12
|
作者：
Lv, Xiaolong [1 ]
Zhao, Xiao [1 ]
Wang, Yongqing [1 ]
Wen, Boran [1 ]
机构：
[1] China Univ Geosci, Sch Geophys & Informat Technol, Beijing 100083, Peoples R China
来源：
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2019年 / 101卷
基金：
中国国家自然科学基金;
关键词：
Transconductance enhancement; Slew rate improvement; Current recycling folded cascode; Adaptive biasing input stage; HIGH SLEW RATE; TRANSCONDUCTANCE ENHANCEMENT; AMPLIFIER;
D O I：
10.1016/j.aeue.2019.01.023
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An improved non-linear current recycling folded cascode operational transconductance amplifier with cascode self-biasing is presented in this paper. To improve the gain-bandwidth and slew rate of traditional current recycling folded cascode amplifier, the adaptive biasing class-AB input stage and non-linear current recycling output stage are utilized to improve the effective transconductance and maximum output current. In addition, a cascode self-biasing structure is applied to the output stage to prevent the PMOS current mirror from entering the linear region during the large signal current. Both the conventional and the proposed current recycling folded cascode amplifier are all designed on SMIC 0.18 mu m. The simulation results show that the proposed non-linear current recycling amplifier achieves 2.1 times the gain-bandwidth and 5.4 times the slew rate that of conventional current recycling amplifier, with only 25% extra power consumption. (C) 2019 Elsevier GmbH. All rights reserved.
引用
收藏
页码：182 / 191
页数：10
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