Variable cut-off digital ladder filters
Variable cut-off digital ladder filters
复制标题
可变截止数字梯形滤波器
DOI：
10.1080/00207217808900943
复制
发表时间：
1978
影响因子：
1.3
通讯作者：
B. Peikari
中科院分区：
文献类型：
--
作者：
S. Erfani;B. Peikari
本文提出了一类现在的变换，其对双端接 LC 梯形滤波器的实现会产生可变截止频率数字滤波器。结果表明，利用这种变换和广义延迟的概念，从给定的原型梯形结构，我们可以构造具有可变截止频率和带宽的低通、高通、带通和带阻滤波器。因此，所得到的可变滤波器在需要调整原型滤波器中的乘法器的最小数量的意义上是规范的。举两个例子来说明该方法的应用。
This paper presents a now class of transformations whose implementation to doubly terminated LC ladder filters results in variable cut-off frequency digital filters. It is shown that using this transformation and the concept of generalized delay, from a given prototype ladder structure, we can construct low-pass, high-pass, band-pass and band-stop filters with variable cut-off frequency and bandwidth. Thu resulting variable filters are canonical in the sense that a minimum number of multipliers in the prototype filter need to be adjusted. Two examples are worked out to illustrate the application of this method.