Title :
Positioning of group delay sections with an LC ladder and the effects of transformations
Author_Institution :
Sussex Univ., Brighton, UK
Abstract :
The problem of group-delay specification and approximation in computer-aided filter design is considered. The author illustrates some of the necessary extensions required to the Z-plane approach to cover the extraction of complex quartets. The extended procedure evaluates the input immittance at a complex frequency, finds the component values for the complex section, and calculates the remaining immittance to a sufficiently good accuracy. The transformation to the bridged-tee form is described
Keywords :
circuit CAD; delay circuits; electric immittance; ladder networks; linear network synthesis; lumped parameter networks; passive filters; LC ladder; Z-plane approach; approximation; bridged-tee form; complex frequency; computer-aided filter design; group delay sections positioning; group-delay specification; input immittance; passive filters; synthesis procedure; transformations; Attenuation; Cutoff frequency; Delay effects; Filters; Lead; Packaging; Passband; Poles and zeros; Prototypes; Speech processing;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo
DOI :
10.1109/ISCAS.1988.15140
