Title :
High-order tunable passive digital filters
Author_Institution :
Dept. of Electr. & Comput. Eng., Windsor Univ., Ont., Canada
Abstract :
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
Keywords :
band-pass filters; band-stop filters; circuit tuning; digital filters; filtering theory; high-pass filters; low-pass filters; network synthesis; passive filters; analytical filter expressions; band-pass filters; band-stop filters; bandwidth; center frequency; cutoff frequency; decomposed second-order filter sections; filter coefficient real-time computation; first-order filter coefficients; frequency transformations; high-order tunable passive digital filters; high-pass filters; low-pass filters; realtime sharp cutoff filtering applications; second-order filter coefficients; Application software; Band pass filters; Bandwidth; Cutoff frequency; Delay; Digital filters; Filtering; Passive filters; Prototypes; Taylor series;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1011449
