利用新型CMOS CCDVCCⅡ实现的电流模式和电压模式可编程二阶滤波器  

Programmable current mode universal biquadratic filter and Programmable voltage mode universal biquadratic filter using CMOS CCDVCCⅡ

作　　者：王卫东[1] 赵怡[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2010年第5期416-421,共6页Journal of Guilin University of Electronic Technology

基　　金：广西科学研究与技术开发计划项目(0731021)

摘　　要：利用宽线性范围跨导器构成新型CMOS电流控制差分电压输入电流传输器(CCDVCCⅡ),所提出的电路由具有动态的长尾电流的差分对和跨导线性环构成。并且用此种新型CCDVCCⅡ分别构成电流模式二阶滤波器和电压模式二阶滤波器。构成的两种滤波器都可通过数字开关获得低通、高通、带通、带阻、全通传输函数,且可以由CCDVCCⅡ的偏置电流改变品质因素和固有频率。采用SMIC 0.18工艺,用Spectre对电路进行仿真,电源电压仅为1.8 V。The paper presents a CMOS current controlled differential voltage current conveyor based on a wide linear range transconductor.The proposed circuit consists of long tail differential pair with dynamic tail current and trans-conductance linearity loop.The novel programmable current mode universal biquadratic filter and programmable voltage mode universal biquadratic filter are realized by using this topology.The two filters both performing completely standard function： low pass,high pass,band pass,band stop,all pass.Furthermore,the quality and pole frequency can be tuned independently by input bias current.Using SMIC 0.18μm CMOS process parameters and Spectre,the power supply is only 1.8V.

关 键 词：电压模式二阶滤波器 电流模式二阶滤波器 CMOS CCDVCCⅡ 

分 类 号：TN713[电子电信—电路与系统]