1-V Low-Power Programmable Rail-to-Rail Operational Amplifier With Improved Transconductance Feedback Technique

被引：13
|
作者：
Dai, Shanshan [1 ,2 ]
Cao, Xiaofei [2 ]
Yi, Ting [2 ]
Hubbard, Allyn E. [1 ]
Hong, Zhiliang [2 ]
机构：
[1] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
[2] Fudan Univ, State Key Lab ASIC & Syst, Shanghai 201203, Peoples R China
来源：
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS | 2013年 / 21卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Constant transconductance; low power; operational amplifier; programmable; rail-to-rail; VLSI CELL LIBRARIES; CMOS INPUT STAGE; VOLTAGE; CIRCUIT; DESIGN; ROBUST; OPAMP;
D O I：
10.1109/TVLSI.2012.2220387
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A low-power process-independent programmable transconductance rail-to-rail operational amplifier (OpAmp) is proposed. It employs an improved transconductance feedback loop that senses the transconductance (gmT) accurately and enforces it to be equal to the conductance of a reference resistor. Experimental results in a 0.13-mu m standard CMOS technology under a 1-V power supply demonstrate a continuous programmable gmT range from 87 to 165 mu A/V with minimum fluctuation of +/- 2.4% and programmable deviation less than 4.5% from the reference value. The OpAmp achieves a unity-gain bandwidth of 3.7 MHz with a 95-pF load while only consuming 187 mu A of quiescent current. The figure of merit of the proposed OpAmp is 1879 MHz.pF/mA.
引用
收藏
页码：1928 / 1935
页数：8
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