一种低噪声高增益零中频放大器的设计与实现  

Design and fulfillment of a low-noise, high gain zero-intermediate-frequency amplifier

作　　者：吴敏杰[1] 杨骏[1] 冯起[1] 潘玉剑[1] 袁乃昌[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电子设计工程》2014年第5期69-71,共3页Electronic Design Engineering

摘　　要：文中介绍了一种低噪声的零中频放大器的设计与实现,通过选用合适的集成运算放大器芯片,完成低噪声、高增益并具备滤波效果的零中频放大器的设计。阐述了运放芯片的选择依据,电路的工作原理并使用Cadence制板软件完成了电路板的设计。实际测试结果表明,该电路工作稳定,噪声、增益、滤波特性等效果均很好。his paper presents a low-noise zero-intermediate-frequency amplifier design and fulfillment.By appropriate choice of integrated operational amplifier chip,we complete the design of the zero-intermediate-frequency amplifier with low-noise,high gain and has the good effect of filtering.This paper explains the choice of op-amp chip basis,the circuit works.At last,we use Cadence software to complete the production of circuit board.The actual test results show that the circuit works stably.The effects of noise,gain,and filtering characteristics are pretty good.

关 键 词：低噪声 高增益 零中频放大器 芯片选择 电路设计 

分 类 号：TN86[电子电信—信息与通信工程]