KHN滤波器频率特性的进一步研究  

Further Research on Frequency Characteristics of KHN Filter

作　　者：李安[1] 郭静[1] 薛卫东[1] 袁战军[1] 黄荷洁[1] 

机构地区：[1]陕西国际商贸学院电子与信息工程系,陕西咸阳712000

出　　处：《海南大学学报（自然科学版）》2010年第2期144-147,共4页Natural Science Journal of Hainan University

基　　金：陕西国际商贸学院自然科学研究基金资助项目

摘　　要：提出了一种能同时或能分别实现低通、高通和带通滤波的多功能KHN滤波器,通过调节其电阻比,其电路也能被修改成一个正交振荡器,而且其电路的极点频率和品质因数能够被独立地,精确地调节.该电路使用了3个集成运放、2个电容和9个电阻,且使用的元件较少,性价比高,计算机仿真证明它正确有效.A new multifunctional KHN filter was designed, which achieve high-pass, band-pass and low-pass illtering respectively and simultaneously. Through modifying resistance ratio, the circuit can become a currentmode oscillator and the pole angular frequency and quality factor can be tuned accurately and independently. The circuit contains three OPs, two capacitors and nine resistances, which has higher cost-effective. The simulated results were also illustrated.

关 键 词：正交振荡器 通用滤波器 集成运算放大器 

分 类 号：TN722.77[电子电信—电路与系统]