High performance folded cascode OTA using positive feedback and recycling structure

被引：48

作者：

Akbari, Meysam ^{[1
]}

Biabanifard, Sadegh ^{[1
]}

Asadi, Shahrouz ^{[2
]}

Yagoub, Mustapha C. E. ^{[3
]}

机构：

[1] Shahid Beheshti Univ, Microelect Lab, GC, Tehran, Iran

[2] Shahid Beheshti Univ, Dept Commun Engn, GC, Tehran, Iran

[3] Univ Ottawa, Sch Elect Engn & Comp Sci, Ottawa, ON, Canada

来源：

ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2015年 / 82卷 / 01期

关键词：

Recycling structure; Folded cascode; Positive feedback; Transconductance; DC GAIN; TRANSCONDUCTANCE; ENHANCEMENT; AMPLIFIER; DESIGN;

D O I：

10.1007/s10470-014-0464-0

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, a new technique for enhancing the transconductance and low frequency output impedance of recycling folded cascode amplifiers is presented. These improvements were achieved by using a positive feedback and upgrading the recycling structure. The new structure benifits from better transconductance, slew rate, and DC gain in comparison to conventional folded cascode (FC) amplifier. Moreover, the input referred noise and input offset are reduced and the phase-margin is improved. The improved amplifier is simulated in 0.18 A mu m CMOS technology, demonstrates a DC gain enhancement of 16.4 dB as well as 117.5 MHz increase in gain bandwidth compared with conventional FC configuration. The amplifier consumes 360 A mu W @ 1.2 V which makes it appropriate for low-voltage applications.

引用

页码：217 / 227

页数：11

共 15 条

[1] Enhancing transconductance of ultra-low-power two-stage folded cascode OTA [J].