一种新型的ω_n和Q可编程MOSFET-C二阶滤波器  

A New MOSFET C Programmable ω n and Q Tow Thomas Filter

作　　者：曾丽美[1] 王艳玲[1] 

机构地区：[1]武汉水利电力大学电气工程学校

出　　处：《半导体情报》1997年第5期39-42,共4页Semiconductor Information

摘　　要：介绍一种新型的ωｎ和Ｑ可编程ＭＯＳＦＥＴ－Ｃ二阶滤波器的新技术。滤波器中的电阻全部用ＭＯＳＦＥＴ代替，构成压控电阻，对滤波器的中心频率ωｎ可通过改变栅极直流控制电压来调节，并且在滤波器的反馈路径中引入非线性电路，使滤波器对Ｑ和ωｎ在很宽范围内编程，而且没有相位误差。A new technique for the implementation of programmable Q and ω nMOSFET C filter is introduced in this paper.Replacing each pair of resistors by four MOSFETs for the filter,the voltage controled resistors are formed.The new technique employs nonlinear circuits in the feedback path of the filter,allowing the tuning of ω n and Q through DC control voltages.The resulting filter is fully Q and ω n programmable over a wide range of values without suffering from phase errors.

关 键 词：可编程 滤波器 MOSFET-C 二阶滤波器 

分 类 号：TN713.91[电子电信—电路与系统]