两输入全差分高频宽线性可调的OTA及其滤波器应用  

A Fully Balanced Two-input, High-frequency, Widely Linear-tunable OTA and its Application to Filters

作　　者：成坚[1] 何怡刚[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电路与系统学报》2004年第4期50-53,共4页Journal of Circuits and Systems

基　　金：国家自然科学基金资助项目(50277010);湖南大学撷英计划;湖南省杰出青年基金资助

摘　　要：文章提出了一种采用两输入全差分结构、线性可调范围宽的高频跨导运算放大器,适合于需大范围连续调谐的高频连续时间滤波器。仿真结果表明,通过频率补偿,在高频情况下,它不仅具有良好的线性输入和线性可调范围,而且具有较好的频率响应特性,对高频滤波器的性能有一定的改善。A fully balanced two-input, high-frequency widely linear-tunable OTA is proposed for the application in wide range of linear-tunable high-frequency continuous-time filters. It is proved by simulation that with phase compensation, the proposed OTA has not only ideal linear input characteristics and tunable frequency range, but also better frequency response in HF applications such as filters.

关 键 词：模拟集成电路 滤波器 跨导运放 频率补偿 调谐 

分 类 号：TN713[电子电信—电路与系统]