通用电调谐双二阶电流模式滤波器  

Universal electronically Tunable Current-mode Biquadratic Filters

作　　者：王卫东[1] 

机构地区：[1]桂林电子工业学院,广西桂林541004

出　　处：《电讯技术》2003年第5期78-83,共6页Telecommunication Engineering

基　　金：广西自治区自然科学基金项目(D200111)

摘　　要：提出了一种利用可变电流增益双输出CCⅡ(DOCCⅡ)构成的状态完全可调谐的双二阶电流模式滤波器。滤波器的参数可以通过DOCCⅡ的可变电流增益因子独立调谐。基于一般双二阶滤波器的设计原则,给出了一种通用电调谐电流模式滤波器的设计方法,并推出了低通、高通、带通、带阻和全通二阶传输函数,给出了相应PSPICE仿真的频响结果。A complete state variable　current-mode biquadratic filters built by duo-output CCⅡ (DOCCⅡ) with variable current gain is presented . All the coefficients of the filter can be independently tuned through the variable current gain factors of the DOCCⅡ.Based on the principles upon which the general biquadratic filter was constructed, a universal electronically tunable current-mode filter is proposed which implements the low-pass, high-pass, band-pass, band-reject and all-pass second order transfer functions simultaneously. The PSPICE simulation frequency responses of second-order filter are also given.

关 键 词：信号处理 双二阶电流模式滤波器 跨导运算放大器 电调谐 DOCCⅡ 可变电流增益双输出 

分 类 号：TN713.2[电子电信—电路与系统]