摘要
集成电路是二十世纪人类最伟大的科技发明之一,而其中运算放大器作为集成电路中品种、数量最多的一类成为了电子系统中必不可少的一部分,随着市场对于运算放大器的精度需求日渐增长,作为集成运放专业化标志的高精度集成运放应运而生,从首代高精度低失调运算放大器μA725到今天较为先进的第四代OPA4191,分别从输入失调电压、输入失调电压漂移、共模抑制比、开环电压增益、电源抑制比、输入电压噪声和输入电流噪声等几个方面对放大器性能进行了优化。另外从工艺上可将放大器分为BJT、CMOS、BiCMOS、SOI和GaAs与GaN,每种工艺各具优势,可按需选择。从目前来看,国内高精度集成运算放大器相比国外同类产品性能差距较大,且国产化芯片替代需求迫切。精密集成运放在将来发展中会在医疗、工业、仪器仪表乃至军事国防方面实现更广泛的应用。对于下一代精密运算放大器的设计展望,主要聚焦于创造更优秀的噪声、失调、温度系数和更为合理的价格。
Integrated circuit is one of the greatest technological inventions of mankind in the twentieth century.Its appearance has greatly promoted the development of electronic information science and technology,and has accelerated human society into the information age.Among them,operational amplifiers,as the most diverse and numerous types of integrated circuits,have become an indispensable part of electronic systems.With the development of product demand,the market’s demand for the accuracy of operational amplifiers is increasing.The high-precision integrated op amp,which is the professional mark of integrated op amps,comes into being.From the first generation of high-precision low-offset operational amplifierμA725 in the early stage to the more advanced fourth-generation OPA4191 today,the input offset voltage,input offset voltage drift,common-mode rejection ratio,open-loop voltage gain,power supply rejection ratio,input voltage noise,and input current noise are optimized for amplifier performance.In addition,the amplifier can be divided into BJT,CMOS,BiCMOS,SOI,GaAs,and GaN by the process.Each process has its own advantages and can be selected according to needs.From the current point of view,the domestic high-precision integrated operational amplifier has a large performance gap compared with similar foreign products,and the domestic chip replacement demand is urgent.In the coming decades,high-precision op amps will play an increasingly important role in different fields such as industrial automation,medical equipment,measuring instruments,automotive electronics,and even military defense.Lower noise,smaller offset,smaller temperature coefficient and higher cost performance will be the focus of next-generation precision amplifier design.
作者
孙婧雯
马奎
杨发顺
SUN Jingwen;MA Kui;YANG Fashun(School of Big Data and Information Engineering,Guizhou University,Guiyang 550025,Chnia;Key Laboratory of Micro-Nano-Electronics of Guizhou Province,Guiyang 550025,China)
出处
《智能计算机与应用》
2020年第8期67-70,共4页
Intelligent Computer and Applications
关键词
集成电路
高精度
精密运算放大器
低失调
噪声
integrated circuits
high precision
precision operational amplifiers
low offset
noise
