| 一种电流跟踪补偿的输入输出全摆幅运算放大器 |
| |
| 引用本文： | 王春锴,木霄易,邵丙铣. 一种电流跟踪补偿的输入输出全摆幅运算放大器[J]. 微电子学与计算机, 2007, 24(5): 120-122,126 |
| |
| 作者姓名： | 王春锴 木霄易 邵丙铣 |
| |
| 作者单位： | 复旦大学,国家微电子材料与元器件微分析中心,上海,200433 |
| |
| 摘 要： | 介绍了一种工作在2.5V电压下、具有全摆幅输入与输出功能的两级CMOS运算放大器。通过一种简单有效的电流跟踪电路实现了输入跨导恒定的要求，这样使得频率补偿变得容易实现；为了降低功耗，输入级工作在弱反型区：输出级采用带有前馈控制电路的AB类输出电路，实现了输出信号的轨至轨。电路具有结构简单、功耗低、面积小、性能高等优点。
|
| 关 键 词： | 运算放大器 亚阈值 全摆幅 恒定跨导 |
| 文章编号： | 1000-7180（2007）05-0120-03 |
| 修稿时间： | 2006-06-01 |
A Rail-to-Rail Input/Output Operational Amplifier with Tracking Current Compensation |
| |
| WANG Chun-kai,Mu Xiao-yi,SHAO Bing-xian. A Rail-to-Rail Input/Output Operational Amplifier with Tracking Current Compensation[J]. Microelectronics & Computer, 2007, 24(5): 120-122,126 |
| |
| Authors: | WANG Chun-kai Mu Xiao-yi SHAO Bing-xian |
| |
| Affiliation: | National Microanalysis Center of Microelectronics Materials and Components/Devices, Fudan University, Shanghai 200433, China |
| |
| Abstract: | This paper presents a two-stage 2.5V CMOS operational amplifier with rail-to-rail input and output ranges. The operational amplifier achieves a constant gm with the help of simple effective current follow-up control circuit, which makes it easier to implement an optimal frequency compensation. In order to reduce the power dissipation, input differential operational pairs are biased in weak inversion. The Class-AB with voltage floating control is used as the second stage, because of which a rail-to-rail output range is achieved. The operational amplifier has a simple structure, good performance with low power and small die area. |
| |
| Keywords: | operational amplifier weak inversion rail-to-rail constant tran conductance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
