一阶电流模式对数域滤波器的设计  

The Design of First-Order Current-Mode Log-Domain Filter

作　　者：杨红姣[1] 曾以成[1] 

机构地区：[1]湘潭大学材料与光电物理学院,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2008年第1期126-130,共5页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金项目(60772015);湘潭大学交叉项目(KL1054/Z10054)资助

摘　　要：提出由传输函数直接设计电流模式低通对数域滤波器的方法,实现了电流模式一阶低通对数域滤波器.并根据一阶低通、高通和全通滤波器之间的结构关系,设计出具有多输出功能的一阶对数域滤波器,该滤波器结构简单,PSPICE仿真表明,它具有良好的频率响应特性,可以实现低电压工作,且能通过改变外部电流调节截止频率.This paper proposes a design method of current-mode lowpass log-domain filter, which is derived from the transfer function. The first-order one is implemented. Based on the structure relative a- mong first-order lowpass, highpass, and allpass filter, we design the log-domain first-order multifunction filter. The proposed filter has a simple structure. PSPICE simulations show that it has good frequency response, and it can be operated at low voltage and electronically tuned by changing an external current.

关 键 词：对数域滤波器 跨导线性单元 传输函数 

分 类 号：TN713.8[电子电信—电路与系统]