Title :
OTA-C filters derived from unbalanced lattice passive structures
Author :
De Queiroz, Antônio Carlos M ; Calôba, Luiz P.
Author_Institution :
Programa de Engenharia Eletrica, Univ. Federal do Rio de Janeiro, Brazil
Abstract :
The authors describe the generation of continuous-time OTA-C filters composed of operational transconductance amplifiers and capacitors based on unbalanced lattice passive prototypes. The obtained structures are the simplest possible for OTA-C filters simulating passive doubly terminated LC low-pass filters with finite transmission zeros, when the active filter must present all the capacitors as grounded. Capacitors to ground at all the nodes that are always canonic in the number of capacitors are also presented
Keywords :
continuous time filters; operational amplifiers; transfer functions; OTA-C filters; canonic representation; continuous-time filters; filter simulation; finite transmission zeros; operational transconductance amplifiers; passive doubly terminated LC low-pass filters; unbalanced lattice passive structures; Active filters; Capacitors; Circuit simulation; Couplings; Filtering theory; Impedance; Lattices; Low pass filters; Passive filters; Resistors;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.394210
