广西师范大学学报（自然科学版） ›› 2014, Vol. 32 ›› Issue (4): 6-10.

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新型高增益CMOS跨导运算放大器

凡东东, 宋树祥, 蒋品群, 岑明灿   

  1. 广西师范大学电子工程学院,广西桂林541004
  • 收稿日期:2014-09-20 发布日期:2018-09-26
  • 通讯作者: 宋树祥(1970-),男,湖南双峰人,广西师范大学教授。E-mail:songshuxiang@mailbox.gxnu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(61361011)

Novel High Gain CMOS Operational Transconductance Amplifier

FAN Dong-dong, SONG Shu-xiang, JIANG Pin-qun, CEN Ming-can   

  1. College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China
  • Received:2014-09-20 Published:2018-09-26

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摘要： 为了解决在低电压、深亚微米工艺条件下获得高增益运算放大器的问题,通过引入电流倍增和分流技术,提出了一种新型高增益可调的跨导运算放大器(OTA)。在1.8 V工作电源下采用0.18 μm COMS标准工艺对其进行Spectre模拟,结果表明,该OTA的直流开环增益在61 dB至91 dB可调,最大静态功耗为434 μW,最小共模抑制比为114 dB。所提出的跨导运放与传统OTA相比,具有高增益和增益可调的优点,可适用于通信、电子测量,以及自动控制等系统。

关键词: CMOS, 跨导运放, 电流处理, 高增益

Abstract: A novel operational transconductance amplifier (OTA) with high and variable gain, by introducing the current multiplication and distribution technology, is proposed to solve the problem of obtaining high and tunable gain operational amplifier in a low voltage and deep sub-micron process. Under the supply voltage of 1.8 V, the OTA is simulated by Spectre in 0.18 μm standard COMS technology. Results show that the OTA gets a DC open loop tunable gain from 61 dB to 91 dB, maximum static power consumption of 434 μW and minimum common mode rejection ratio of 114 dB. Compared with traditional OTA, the proposed OTA has the advantages of high and variable gain, it can be applied to communication, electronic measurement and automatic control systems.

Key words: CMOS, OTA, current processing, high gain

中图分类号: 

  • TN721
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