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

fYear

2006

fDate

21-24 May 2006

Lastpage

2956

Abstract

In this paper, we present a fast algorithm to derive the harmonic distortion in fully balanced G_m-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; G_m-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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.2006.1693244

Filename

1693244