摘要
正交偶极子阵列声波测井仪中前端信号采集和处理单元大量使用了VCVS有源滤波器。滤波器的设计过程首先由函数的逼近得出一般传递函数,再用相应电路元件搭建电路实现传递函数。基于这一点,介绍利用巴特沃斯函数逼近法设计四阶VCVS有源滤波器的方法和步骤,利用软件Matlab简化了滤波器传递函数运算,并对所设计滤波器进行辅助分析和仿真,最终的仿真结果和理论分析一致。
VCVS active filters are greatly used in front signal acquisition and processing unit of the Cross Multipole Array Acousticlog tool. The filter design procedure is： by giving functional approximation firstly, the general transfer function is obtained, then we establish suitable circuit to realize the transfer function using circuit components. Introduced were the method and the procedure of 4-th order VCVS active filter design based on Butterworth approximation. The powerful software Matlab is used to simplify calculation of transfer function of the filter, and simulation and analysis are carried out. The simulation result verifies theoretical analysis.
出处
《测井技术》
CAS
CSCD
2005年第6期567-570,共4页
Well Logging Technology
