一种采用单运算跨阻放大器实现的模拟乘法器  

An Analog Multiplier Implemented by a Single Operational Transresistance Amplifier

作　　者：李玉琴 余金永 葛动元 LI Yuqin;YU Jinyong;GE Dongyuan(College of Intelligent Engineering,Guangxi City Vocational University,Chongzuo Guangxi 532100,China;School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou Guangxi 545006,China)

机构地区：[1]广西城市职业大学智能工程学院,广西崇左532100 [2]广西科技大学机械与汽车工程学院,广西柳州545006

出　　处：《电子器件》2024年第2期358-363,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(51765007);2020年广西高校中青年教师科研基础能力提升项目(2020KY66009)(桂教科研(2020)1号);2019年崇左市科技计划项目(崇科FA2019010)。

摘　　要：针对广泛应用于核电子技术领域的模拟乘法器进行了研究,提出了一种采用单运算跨阻放大器实现的模拟乘法器。首先基于运算跨阻放大器的基本结构和输入输出关系,提出了基于单OTRA的基本乘法器电路。然后,为了消除OTRA的有限跨阻增益对乘法器的影响,提出了在直流偏置下叠加小信号的实现方案和基于MOS的乘法器结构,以实现对高频应用的补偿。还讨论了其作为平方器和振幅调制器的应用。最后通过PSPICE仿真验证了提出的理论设计,表明仿真结果与理论设计吻合得很好。The analog multiplier,which is widely used in the field of nuclear electronics,is studied,and an analog multiplier,which is implemented using a single operational transresistance amplifier(OTRA),is proposed.Firstly,based on the basic structure of operational transresistance amplifier and the input⁃output relations,a basic multiplier circuit based on a single OTRA is proposed.Then,in order to eliminate the influence of finite transresistance gain of OTRA on the multiplier,a scheme for implementing a small signal su⁃perimposed on DC bias and a multiplier structure based on MOS are proposed to compensate for high frequency applications.Its appli⁃cations as a square and amplitude modulator are also discussed.Finally,the proposed theoretical design is verified through PSPICE sim⁃ulation,which shows that the simulation results agree well with the theoretical design.

关 键 词：电子功能部件 运算跨阻放大器 模拟乘法器 小信号分析 传输特性 频率响应 应用实例 

分 类 号：TN713.8[电子电信—电路与系统]