Title :
A unified matrix method for systematic synthesis of log-domain ladder filters
Author :
Ng, A.E.J. ; Sewell, J.I. ; Drakakis, E.M. ; Payne, A.J. ; Toumazou, C.
Author_Institution :
Dept. of Electron. & Electr. Eng., Glasgow Univ., UK
Abstract :
This paper describes a matrix-based method of synthesizing log-domain ladder filters. The nodal matrix equations describing a LCR prototype are made directly realisable, facilitating the design of high order filters. The problem of floating capacitors normally required to realise transmission zeros in the log-domain is solved by matrix transformations. Simulated results of different designs derived by various matrix decompositions validate the proposed procedures, which have been formalised in the CAD filter package XFILTER
Keywords :
active filters; band-pass filters; circuit CAD; elliptic filters; ladder filters; linear network synthesis; matrix decomposition; poles and zeros; CAD filter package; LCR prototype; XFILTER package; floating capacitors; high order filters; ladder filter synthesis; log-domain ladder filters; matrix decompositions; matrix transformations; nodal matrix equations; transmission zeros; unified matrix method; Capacitors; Educational institutions; Filtering theory; Matrix decomposition; Network synthesis; Nonlinear equations; Nonlinear filters; Prototypes; Vectors; Voltage;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921810
