Title :
On the characterization and reduction of distortion in bandpass filters
Author :
Cherry, James A. ; Snelgrove, W. Martin
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
fDate :
5/1/1998 12:00:00 AM
Abstract :
In this paper we consider the nonlinear mixing products that arise and cause distortion in weakly nonlinear bandpass filters that might be used in a radio receiver. Volterra series analysis is applied to a Gm-C filter with weak cubic nonlinearities in the transconductance amplifiers so that explicit formulae for the amplitudes of the mixing products can be derived and an architecture for the reduction of distortion proposed, The analysis is used to aid in the characterization of distortion in practice, both in SPICE simulation and laboratory work
Keywords :
Volterra series; active filters; band-pass filters; filtering theory; harmonic distortion; intermodulation distortion; nonlinear network analysis; radio receivers; radiofrequency filters; transfer functions; Gm-C filter; Volterra series analysis; Volterra transfer functions; bandpass filters; characterization; distortion reduction; nonlinear mixing products; radio receiver; transconductance amplifiers; weak cubic nonlinearities; Band pass filters; Circuits; Laboratories; Linearity; Nonlinear distortion; Passive filters; Radio frequency; Receivers; SPICE; Transconductance;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
