| 一种亚阈区工作的轨至轨输入CMOS运放设计 |
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| 引用本文： | 黄云川,高涛,贾政亚. 一种亚阈区工作的轨至轨输入CMOS运放设计[J]. 电子质量, 2004, 0(8): 66-68 |
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| 作者姓名： | 黄云川 高涛 贾政亚 |
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| 作者单位： | 电子科技大学微电子与固体电子学院,成都,610054;电子科技大学微电子与固体电子学院,成都,610054;电子科技大学微电子与固体电子学院,成都,610054 |
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| 摘 要： | 基于0.34 CMOS工艺,设计了一个Rail-to-Rail输入,静态电流小于3,工作在亚阈区的极低功耗运算放大器.采用一个电流开关和一个电流镜,并结合工作在亚阈区的互补输入差分对,保证了输入级的恒定跨导.在求和电路部分采用对称求和以及浮动电流源技术,极大的提高电路电压增益和频率极点的稳定性.同时讨论了一种设计亚阈区工作电路所采取的方法.Hspice仿真结果表明,该运放在全摆幅输入范围内,能保证输入级跨导的变化在-2%～-4%之间.
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| 关 键 词： | 亚阈区 微功耗 轨至轨 低压 rail to rail CMOS |
| 文章编号： | 1003-0107(2004)08-0066-02 |
Design of a Operational Amplifier in Weak Inversion with Rail-to-Rail Input Stage |
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| Huang Yun-chuan,Gao Tao,Jia Zhen-ya. Design of a Operational Amplifier in Weak Inversion with Rail-to-Rail Input Stage[J]. Electronics Quality, 2004, 0(8): 66-68 |
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| Authors: | Huang Yun-chuan Gao Tao Jia Zhen-ya |
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| Abstract: | A operational amplifier in weak inversion with rail-to-rail input stage is presented in the paper, which is based on 0.34- CMOS technology. It consists of complementary input pairs biased in weak inversion (WI) and a summing circuit using a fioating current source. Employing these techniques a OTA which has less than about 4% deviation in over the common-mode input range and 3 biasing circuit is realized. |
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| Keywords: | rail to rail CMOS |
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