摘要
为了满足通信与信号处理实验中对谐振器的需求,分析了美国凌特公司推出的连续时间、有源RC滤波器芯片LTC1562的工作原理,并对中心频率的计算公式进行了推导。应用LTC1562和滤波器设计软件Filter CAD,设计了一个中心频率为120 kHz的12阶Bessel有源带通滤波器做谐振器,并做成电路板。检测结果表明该谐振器的设计频率特性精确度高、器件简洁、易实现,适合在相关系统中应用。
For meeting the need of resonator in communication and signal-processing experiments during the past decades,the working principle of LTC1562 is analyzed,which is a continuous-time,active RC filter,and the computing formula of the center frequency is deduced,then by use of LTC1562 and filter design software Filter CAD,a 12th order Bessel active band-pass filter with its center frequency at 120kHz is designed and realized as resonator,the experiment results show that the design of resonator has a high precision and strong practicality,and is suitable for use in related systems.
出处
《无线电工程》
2011年第11期40-42,60,共4页
Radio Engineering
基金
华北电力大学本科教育教学改革研究项目"通信工程专业创新人才培养实践教学研究"
