Title :
OTA-C simulation of passive filters via embedding
Author :
Calôba, Luiz P. ; Queiroz, Antônio C M De
Author_Institution :
Dept. of Electr. Eng., Univ. Federal do Rio de Janeiro, Brazil
Abstract :
A general method for operational transconductance amplifier (OTA)-C filter synthesis is presented. Given any passive RLC network, several economical active structures can be obtained from it, all retaining the passive sensitivities of the original network. By following simple design rules, the sensitivities to the OTAs´ transconductances can also be maintained at low level. The structures obtained can be made to present all the capacitors grounded, and the effect of parasitic circuit elements can be easily predicted by looking for the equivalents in the prototype. The filters are fully tunable and so can be used in conjunction with automatic tuning techniques to realize precise, fully integrated continuous-time filters
Keywords :
active filters; linear network synthesis; operational amplifiers; tuning; OTA-C filters; automatic tuning techniques; design rules; economical active structures; effect of parasitic circuit elements; grounded capacitors; integrated continuous-time filters; operational transconductance amplifier; passive sensitivities; tunable; Capacitors; Circuit optimization; Economic forecasting; Network synthesis; Operational amplifiers; Passive filters; Prototypes; RLC circuits; Transconductance; Tunable circuits and devices;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100540
