应用于跨导放大器设计的线性度优化方法  

A Linear Optimization Method and Its Application to Transconductance Amplifier

作　　者：傅文渊[1,2] 凌朝东[1,2] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361002 [2]厦门市专用集成电路系统重点实验室,福建厦门361008

出　　处：《电子学报》2013年第6期1214-1218,共5页Acta Electronica Sinica

基　　金：福建省科技计划(No.2011H6018);中央高校基本科研业务费专项基金(No.10QZB02);华侨大学科研基金(No.11HZR03)

摘　　要：基于跨导放大器线性度理论和数学分析,提出了一种提高线性度的方法.该方法通过数学理论分析和模拟实验证实,双端输入双端输出结构的跨导器线性度优于单端输入单端输出的跨导器,且两个输入端信号满足一端是另一端幅度的4/3倍加1时,跨导器线性失真度最小.根据该优化方法设计了一种新型跨导器,仿真实验表明,跨导器无杂散动态范围为60.25dB,噪声平台达到-100dB.Based on the linearity theory of transconductance amplifier and mathematical analysis,a method of improving linearity is presented.In this method,the mathematical analysis and simulation experiments proved that linearity of double ended input transconductor is better than single ended input transconductor.When one end input signal is 4/3 of the other end input signal and plus 1,the transconductor linear distortion can be minimized.A new transconductor is proposed according to the optimization measure. The simulation results show that the spurious free dynamic range of the transconductor is 60.25dB,and noise-floor reach up to -100dB.

关 键 词：跨导器 线性度 双端输入-双端输出 谐波失真 

分 类 号：TN72[电子电信—电路与系统]