用信号流图设计任意阶FTFN-RC通用滤波器  

Design of General Arbitrary Order FTFN-RC Filter with Signal-flow Graph

作　　者：席燕辉[1,2] 彭辉[1] 彭良玉[3] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083 [2]长沙理工大学电气与信息工程学院,长沙410077 [3]湖南师范大学物理与信息学院,长沙410081

出　　处：《电子与信息学报》2010年第1期227-230,共4页Journal of Electronics & Information Technology

基　　金：湖南省自然科学基金(06JJ50117)资助课题

摘　　要：该文提出采用信号流图实现任意阶FTFN-RC通用滤波器的方法。通过对网络函数的直接分析,导出了任意阶传输函数的FTFN-RC实现电路。该滤波电路仅包含n个有源器件,n个接地电容和n个接地电阻,可以实现n阶低通、带通、高通电流模式滤波。不必改变电路内部结构就可以同时在不同的输出端实现不同的滤波功能,简化了电路结构,便于集成。完成了MOS级的PSPICE仿真,仿真结果表明了所提出电路的可行性。A new design method is presented for designing FTFN（Four-Terminal Floating Nullor）-RC filter of arbitrary order with signal flow graph. A FTFN-RC configuration that can be used to realize arbitrary order transfer function is obtained by direct analysis of network function. The filter circuit which contains n active elements, n grounded capacitors and resistors can produce nth order low-pass, band-pass and high-pass filters without changing the internal structure of circuit. So the circuit is simplified and integrated conveniently. PSPICE simulation at the MOS transistor level is carried out and results show that the proposed circuit is feasible.

关 键 词：信号流图 四端浮地零器 电流模式 N阶滤波器 

分 类 号：TN713[电子电信—电路与系统]