Title :
Signal flow graph OTA-C integrated filters
Author :
De Queiroz, Antonio C M ; Caloba, Luiz P. ; Sanchez-Sinencio, Edgar
Author_Institution :
Dept. of Electr. Eng., Univ. Federal do Rio de Janeiro, Brazil
Abstract :
Techniques are presented for the synthesis of OTA-C (operational transconductance amplifiers and capacitors) filters as leapfrog simulations of certain types of passive prototypes. Three kinds of simulations for low-pass filters are presented: for all-pole ladder filters, for ladder filters with finite transmission zeros, and for symmetrical nonladder filters obtained from unbalanced lattice structures. Problems such as dynamic range scaling, and symmetrical layout to maximize immunity to temperature and process gradients over the filter structure in fully integrated realizations, are discussed
Keywords :
active filters; ladder networks; low-pass filters; poles and zeros; all-pole ladder filters; dynamic range scaling; finite transmission zeros; fully integrated realizations; leapfrog simulations; low-pass filters; operational transconductance amplifiers; signal flow graph OTA-C integrated filters; symmetrical layout; symmetrical nonladder filters; unbalanced lattice structures; Capacitors; Filtering theory; Flow graphs; Lattices; Low pass filters; Operational amplifiers; Passive filters; Signal synthesis; Transconductance; Virtual prototyping;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo
DOI :
10.1109/ISCAS.1988.15372
