一种用于低压放大器的可编程轨对轨常数g/sub /输入结构

2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353) Pub Date : 2000-05-28 DOI:10.1109/ISCAS.2000.857543

Shouli Yan, E. Sánchez-Sinencio

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引用次数: 6

摘要

我们提出了一种不依赖于MOS晶体管工作区域的低电压轨对轨恒g/sub - m/输入级技术。设计了一个运放来演示使用MOSIS AMJ 1.2 /spl mu/m技术的新想法。当驱动10 k/spl ω /和10 pF负载、240 /spl mu/A电流消耗和3 V电源时，实现了61/spl度/相位裕度的2.5 MHz单位增益带宽。从轨道到轨道，输入阶段的g/sub /变化在/spl + /3%以内。通过改变偏置电流，单位增益带宽可以从90 kHz编程到3 MHz。

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A programmable rail-to-rail constant-g/sub m/ input structure for LV amplifier

We proposed a novel technique for low voltage rail-to-rail constant-g/sub m/ input stages, which does not depend on the operation regions of the MOS transistors. An op amp was designed to demonstrate the new idea using MOSIS AMJ 1.2 /spl mu/m technology. A 2.5 MHz unity-gain bandwidth with 61/spl deg/ phase margin was achieved when driving 10 k/spl Omega/ and 10 pF load, with 240 /spl mu/A current consumption and a power supply of 3 V. The g/sub m/ variation of the input stage is within /spl plusmn/3% from rail-to-rail. By changing the bias current, the unity-gain bandwidth could be programmed from 90 kHz to 3 MHz.

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2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353)

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