【作者】 石文孝； 付圆媛； 王树勋； 迟学芬；

【Author】 FU Yuan-yuan, SHI Wen-xiao, CHI Xue-fen (College of Communication Engineering, Jilin University, Changchun 130012)

【机构】 吉林大学通信工程学院 信息产业部信息科学重点实验室；

【摘要】 本文提出了一种三输入单输出基于电流镜的多功能电流模式双二阶滤波器电路结构。该滤波器由两个基本电流镜和两个无耗积分器构成,改变其输入信号的输入位置,可以实现不同类型的滤波响应特性。给出了CMOS实现电路,分析并模拟了所提出的滤波器的传递特性,PSPICE仿真结果表明,所提出的电路方案正确有效。电路具有灵敏度低,多功能的特点,适于实现全集成连续时间滤波器。更多还原

【Abstract】 A multifunction current-mode biquad filter configuration with three inputs and one output using current mirrors is proposed in the paper. The filter uses two basic current mirrors and two loss-free integrators, and can realize different kinds of filtering responses by changing input signal forms. Its related CMOS circuit is presented.The transfer function properties of the filter are analyzed. PSPICE simulation results show that the proposed circuit is valid. And the circuit has several advantages, such as very low filter sensitivities, versatility, and suitability for fully integration.更多还原