Title :
Noise performances of OTA-C filters
Author :
Espinosa, G. ; Montecchi, F. ; Sánchez-Sinencio, E. ; Maloberti, F.
Author_Institution :
Dipartimento Elettronica, Pavia Univ., Italy
Abstract :
Noise performances of OTA-C (operational transconductance amplifiers and capacitors) filters are presented in order to derive their dynamic range limitations. In particular, the noise performances of elementary building blocks are considered, and then the noise of several OTA-C biquadratic structures is evaluated. Both white and 1/f noise contributions are taken into account. Analytical expressions and simulated results are given together with some practical design considerations. The results put in evidence how the choice of any topology affects the noise limitations of the filter. Topologies that allow more degrees of freedom correspond to noisier structures.<>
Keywords :
active filters; random noise; 1/f noise; OTA-C filters; biquadratic structures; dynamic range limitations; filter topology; noise limitations; noise performances; operational transconductance amplifiers; white noise; Active filters; Analytical models; CMOS technology; Circuit noise; Dynamic range; Frequency; MOSFETs; Performance evaluation; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15374
