Title :
A Q-enhanced active-RLC bandpass filter
Author :
Duncan, Ralph A. ; Martin, Kenneth W. ; Sedra, Adel S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
The passive elements R, L, and C are combined with an amplifier to realize a high-Q bandpass filter. Positive feedback is used to enhance the finite Q of the lossy integrated inductors, and design equations are given that take into account the finite gain and finite bandwidth of the amplifier. It is shown that a quality factor of 20 at 1 GHz is possible with 10-GHz transistors. Preliminary noise analysis indicates promising results
Keywords :
Q-factor; RC circuits; active filters; band-pass filters; circuit noise; operational amplifiers; 1 GHz; 10 GHz; active-RLC bandpass filter; design equations; finite bandwidth; finite gain; high-Q bandpass filter; lossy integrated inductors; noise analysis; quality factor; Band pass filters; Bandwidth; Equations; Feedback; Flow graphs; Inductors; Proportional control; Q factor; RLC circuits; Voltage control;
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.1993.393998
