一种低压高性能的Rail-to-Rail运算放大器

王丹; 姜宇; 郭桂良; 吕英杰

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一种低压高性能的Rail-to-Rail运算放大器

更新时间：2026-09-04

- 一种低压高性能的Rail-to-Rail运算放大器
- A Rail-to-Rail Operational Amplifier with Low Voltage and High Performance
- 微电子学与计算机 2017年34卷第2期页码：68-72
- 作者机构：
  
  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
- 作者简介：
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- 纸质出版：2017
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王丹, 姜宇, 郭桂良, 吕英杰. 一种低压高性能的Rail-to-Rail运算放大器[J]. 微电子学与计算机, 2017, 34(2): 68-72.

WANG Dan, JIANG Yu, GUO Gui-liang, et al. A Rail-to-Rail Operational Amplifier with Low Voltage and High Performance[J]. 2017, 34(2): 68-72.
王丹, 姜宇, 郭桂良, 吕英杰. 一种低压高性能的Rail-to-Rail运算放大器[J]. 微电子学与计算机, 2017, 34(2): 68-72. DOI：

WANG Dan, JIANG Yu, GUO Gui-liang, et al. A Rail-to-Rail Operational Amplifier with Low Voltage and High Performance[J]. 2017, 34(2): 68-72. DOI：

摘要

采用TSMC 0.18 μm CMOS工艺

设计实现了一种低压恒跨导、高性能的Rail-to-Rail运算放大器.输入级采用NMOS和PMOS并联的互补差分对结构

使共模输入电压范围达到Rail-to-Rail

并通过改进的开关电流结构使输入级的有效跨导在共模输入范围内保持恒定.输出级采用反馈式AB类结构

以达到输出电压的全摆幅

同时通过米勒补偿控制零极点来保证放大器工作的稳定性.整个电路在1 V的单电源电压

20 pF负载电容的工作条件下工作

Spectre仿真结果显示

直流开环增益为127 dB

单位增益带宽为6.4 MHz

相位裕度67.58°

总谐波失真为-107 dB.

Abstract

A rail-to-rail operational amplifier with low voltage constant transconductance and high performance is introduced with TSMC 0.18 μm CMOS process. The input stage uses NMOS and PMOS complementary differential pairs to make the common-mode input voltage rail-to-rail. Meanwhile the input stage uses current switches with constant common-mode output current to keep the effective transconductance constant over the whole input range. A class-AB output stage with folded mesh feedback is used to achieve the rail-to-rail output range. And miller compensation is adopted to guarantee the stability of the operational amplifier by controlling the zero and pole. The whole circuit is simulated in Cadence Spectre with a single 1 V supply. The simulation results show that the dc open-loop gain of the op-amp is more than 127 dB

and the unity-gain frequency is 6.4 MHz with phase margin of 67.58° while driving 20 pF. The total harmonic distortion of a unity-gain connected amplifier is -107 dB.

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references

毕查德·拉扎维. 模拟CMOS集成电路设计[M]. 陈贵灿, 程军, 张瑞智, 等译. 西安: 西安交通大学出版社, 2003.

Wang Xichuan, Deng Huan, Zhang Ting, et al. A Rail-To-Rail Op-Amp with Constant Gm Using Current Switches[C] // Proceedings of HDP'07. Shanghai: IEEE, 2007: 1-3.

齐步坤. 轨到轨CMOS运算放大器研究与设计[D]. 天津: 天津大学, 2009.

Hogervorst R, Tero J P, Eschauzier R G H, et al. A compact power-efficient 3V CMOS rail-to-rail input/output operational amplifier for VLSI cell libraries[J]. IEEE Journal of Solid-StateCircuits, 1994, 29(12): 1505-1513. DOI: 1505

Zha Xiaofang, Yin Yongsheng. The design rail-to-rail operational amplifier used in PGA[C]//ASID'2015. Xiamen: IEEE, 2015: 61-65.

Deng Liang, Deng Honghui, Yin Yongsheng, et al. 1-V rail-to-rail constant trans-conductance operation amplifier[C] // ICEMI'2009. Beijing: IEEE, 2009: 798 -801.

Li Xian, Chang Changyuan, Li Juan. A rail-to-rail op amp for VLSI cell with constant performance[C] // Proceedings of ECCTD 2007. Sevilla: IEEE, 2007: 16-19.

Kumar Vivek, Kashyap Kamal K. A simple low power OTA based circuitry for constant-gm rail-to-rail operation[C]//ICSPCT'2014. Ajmer: IEEE, 2014: 151-157.

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

马玉杰, 高俊丽, 后永奇, 等. 3.3V/0.18 μm恒跨导轨对轨CMOS运算放大器的设计[J]. 电子技术应用, 2012, 38(11): 48-50. DOI: 48

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