High-order tunable passive digital filters
High-order tunable passive digital filters
复制标题
高阶可调谐无源数字滤波器
DOI：
10.1109/iscas.2002.1011449
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Kwan
中科院分区：
文献类型：
--
作者：
H. Kwan
本文介绍了用于实时锐截止滤波应用的高阶可调低通、高通、带通和带阻无源数字滤波器。推导了一阶和二阶无源数字滤波器在低通到低通/高通频率变换后的系数的解析表达式。对于低通到带通/带阻的频率变换，还导出了二阶和分解的二阶无源数字滤波器部分的每个系数的解析表达式。这些解析表达式便于实时计算所有所需的滤波器系数，从任何指定的新的截止频率的低通/高通的情况下，和从任何指定的新的中心频率和/或新的带宽的带通/带阻的情况下。
In this paper, high-order tunable low-pass, high-pass, band-pass, and band-stop passive digital filters for realtime sharp cutoff filtering applications is introduced. An analytical expression for each of the coefficients of the first-order and the second-order passive digital filter sections after low-pass to low-pass/high-pass frequency transformation has been derived. For the low-pass to band-pass/band-stop frequency transformation, an analytical expression for each of the coefficients of the second-order and the decomposed second-order passive digital filter sections has also been derived. These analytical expressions facilitate the real-time computation of all the required filter coefficients, from any specified new cutoff frequency for the low-pass/high-pass case, and from any specified new center frequency and/or new bandwidth for the band-pass/band-stop case.