二阶有源滤波器的实验研究与改进

Experimental study and improvement for second-order active filter

通过理论分析给出了OPA型二阶有源滤波器电压传输函数的一般公式,结合DVCC-HX20型信号与系统实验箱中实验电路进行计算分析,指出了实验电路存在的问题,在不改变原电路结构的情况下,给出了两种具体的改进方法,并通过实施取得了满意的实验结果.

By theory analysis,a common formula of voltage transfer function for OPA-type second-order active filter is presented.With caiculated experiment circuits in DVCC-HX20 type experiment case for signals and systems,the problem in these circuits are pointed out.Under the circuits structure not changed,two improvement methods are offered.Through these methods put into effect,satisfactory experiment result are acquired.