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

fYear

1988

fDate

7-9 Jun 1988

Firstpage

2165

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1988., IEEE International Symposium on

Conference_Location

Espoo

Type

conf

DOI

10.1109/ISCAS.1988.15372

Filename

15372