1. 南开大学 电子信息与光学工程学院,天津,300071
2. 中国科学院 机构 微电子研究所,北京,100029
纸质出版:2017
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王丹, 郭桂良, 姜宇, 吕英杰, 阎跃鹏. 一种基于斩波技术的轨到轨运算放大器的分析与设计[J]. 微电子学与计算机, 2017, 34(10): 97-100.
WANG Dan, GUO Gui-liang, JIANG Yu, et al. Analysis and Design of a Rail-to-Rail Operational Amplifier Based on Chopper Technology[J]. 2017, 34(10): 97-100.
采用TSMC 0.18 μm CMOS工艺
设计实现了一种低压、低失调、恒跨导的轨到轨运算放大器.运算放大器在保证输入级跨导在整个共模范围内恒定的前提下
采用轨到轨的折叠共源共栅输入级
输入管工作在亚阈值区
采用反馈式AB类输出级以实现轨到轨的输出摆幅
同时采用斩波稳定技术减小输入参考失调和噪声.电路工作在1 V单电源电压下
仿真得到119 dB的直流增益和5.6 MHz的增益带宽积.蒙特卡罗仿真结果显示失调电压分布的标准差为14 μV
输入噪声普密度为18.19 nV/√Hz.
A rail-to-rail operational amplifier with low-voltage low-offset and constant transconductance is designed in TSMC 0.18 m CMOS process.The operational amplifier has a rail-to-rail folded cascode input stages
which ensures a constant transconductance over the available common-mode input range and all input transistors operate in sub-threshold region.A class-AB output stage with folded mesh feedback is used to achieve the rail-to-rail output range.The chopper stabilization technique is exploited to reduce the input referred offset and noise.The circuit is simulated in Cadence Spectre with a single 1 V supply.The simulation results show that the dc gain is 119dB and the GBW is 5.6 MHz.Montecarlo simulations demonstrate an offset distribution with 14 V standard deviation.The input noise spectral density is 18.19 nV/√Hz
Ge Fuding, Farahani Bahar Jalali. A versatile chopper-stabilized rail-to-rail operational amplifier[C]//Symposium on Circuits % Systems. IEEE, 2008: 113-116.
Pipino A, Pezzotta A, Resta F, et al. A rail-to-rail-input chopper instrumentation amplifier in 28nm CMOS[C]//IEEE International Conference on Electronics. IEEE, 2016: 73-76.
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张雷. 一种低压高精度CMOS运算放大器设计[D]. 镇江: 江苏大学, 2010.
Langen K J de, HuijsingJ H. Compact low-voltage power-efficient operational amplifier cells for VLSI[J]. IEEE Journal of Solid-State Circuits, 1998, 33(10): 1482- 1496. DOI: 1482
Enz C C, Temes G C. Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated Double sampling, and chopper stabilization[J]. Proceedings of the IEEE, 1996, 84(11): 1584-1614. DOI: 1584
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