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本文介绍的有源纸通滤波器,是用RC网络配合运算放大器来模拟LC滤渡特性的传递函数,以构成滤波器——有源滤波器。在智能仪器中,将模拟量转换为数字量,后经微电脑处理及将一些输出的数字量恢复成模拟量的过程。它不可避免地会产生量化噪声和干拢,因此,必须在输出端加一级滤波器,将其消除。有源滤波器体积小,幅频特性好,可用于智能仪器中,但其计算十分繁锁、复杂,本文利用电子计算机进行大量计算来确定其参数,并制成数据表格,它适合于工程上经常采用的查表法。因而减少了大量的人工计算,并提高精度。
This paper describes the active paper pass filter, RC network with operational amplifiers to simulate the LC filter characteristics of the transfer function to form a filter - active filter. In smart instruments, the analog to digital conversion, after processing by the microcomputer and some of the output digital return to the process of analog. It inevitably produces quantization noise and interference, so a filter must be added at the output to eliminate it. The active filter is small in size and good in amplitude-frequency characteristics and can be used in smart instruments. However, its calculation is very complicated and complicated. In this paper, a large number of calculations are performed on an electronic computer to determine its parameters and form a data table that is suitable for engineering Often used look-up method. Thus reducing a large number of manual calculations and improve accuracy.