Title :
A fast state-space algorithm to estimate harmonic distortion in fully differential weakly nonlinear G/sub m/-C filters
Author :
Zhang, Zhaonian ; Celik, Abdullah ; Sotiriadis, Paul
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD
Abstract :
In this paper, we present a fast algorithm to derive the harmonic distortion in fully balanced Gm-C filters. It is based on state-space modeling and decomposition of the filter into a cascade of an input stage, a core stage and an output stage. This approach results in compact expressions for the distortion that involve explicitly the structural matrices of the filter and the values of the circuit elements. The algorithm was verified using a third-order low pass Butterworth filter designed in a 0.5mum CMOS process. The theoretical results are found to be in good agreement with CADENCE and MATLAB simulations
Keywords :
Butterworth filters; CMOS integrated circuits; harmonic distortion; low-pass filters; nonlinear filters; state-space methods; 0.5 micron; Butterworth filter; CADENCE; CMOS process; Gm-C filters; MATLAB; harmonic distortion; low pass filter; nonlinear filter; state-space modeling; Analog-digital conversion; Digital filters; Frequency; Harmonic distortion; Mathematical model; Power harmonic filters; SPICE; State estimation; Topology; Transconductors;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693244
