新颖的电压模式通用双二阶CFOA滤波器

提出了一种新颖的电压模式通用双二阶电流反馈放大器(Current-feedback operational amplifier,CFOA)滤波电路结构,该电路由四个电流反馈放大器、两个电容和十个电阻构成,可同时实现低通、带通、高通、带阻和全通的滤波功能。给出了实现电路,并完成了计算机仿真。PSPICE仿真结果表明,所提出电路结构简单,灵敏度低。所有电容接地,便于全集成。

基于CFOA的低通、带通和高通滤波器

用 3个电流反馈运算放大器 ( Current feedback O perational A m plifier,CF OA)、 3个接地电容、 3个电阻和1个浮地电阻的组合提出了一种高输入阻抗低通、带通和高通滤波器电路。该滤波器电路有如下特征 :用同一结构实现了低通、带通和高通滤波器 ,无需元件匹配 ,接地电容的使用使得该电路适合于集成实现 。

CFOA Based Low Pass and High Pass Ladder Filter—A New Configuration

A new technique using signal flow graph for conversion of ladder based filter into CFOA based filter has been proposed. The proposed technique converts the existing LC ladder based filter into CFOA in low pass and high pass configuration. The design of low pass filter and high pass filter has been realized using the proposed technique. The proposed configuration is implemented using CFOA as an active device and all the capacitors are grounded. Simulation has been carried out using simulation software I-cap. The simulation results have been demonstrated and discussed.

CFOA Based Band Pass and Band Stop Ladder Filter—A New Configuration

A new technique for the conversion of ladder based filter into CFOA based filter has been proposed. The technique uses signal flow graph and converts the existing LC ladder based filter into band pass & band stop configurations. The design of band pass and band stop filter has been realized using the proposed technique. The proposed configuration is implemented using CFOA as an active device and all the capacitors are grounded. CFOA based circuits have greater linearity, high dynamic rate, high slew rate and high signal bandwidth. Simulation has been carried out using simulation software P Spice (v10.1). The simulation results have been demonstrated and discussed.

集成电流反馈运算放大器的应用与实践特性及应用设计

介绍电流反馈运算放大器包括电路组成，工作原理及有关的应用设计。