Title :
Signal-flow graph OTA-C band-pass and band-reject integrated filters
Author :
Caloba, Luiz P. ; De Queiroz, Antonio C M ; Sanchez-Sinencio, Edgar
Author_Institution :
Dept. of Electr. Eng., Univ. Federal do Rio de Janeiro, Brazil
Abstract :
A simple and straightforward method for the synthesis of OTA (operational transconductance amplifier) -C bandpass and band-reject filters is presented. The method mixes the signal-flow-graph and component-simulation techniques. The final filters have good sensitivity performance and all capacitors grounded, which are advantages for integration. The method can be applied to the OTA-C simulation of any ladder passive prototype filter. Problems related to the presence of nonobservable poles created by the structure of these filters are discussed, and solutions are proposed
Keywords :
active filters; band-pass filters; band-stop filters; OTA-C filters; band-reject filters; bandpass filters; capacitors grounded; component-simulation techniques; grounded capacitors; integrated filters; ladder passive prototype filter; low sensitivity; nonobservable poles; operational transconductance amplifier; signal-flow-graph; solutions; straightforward method; Band pass filters; Capacitors; Circuit simulation; Dynamic range; Frequency; Impedance; Low pass filters; Prototypes; Shunt (electrical); Virtual prototyping;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100674
