Analysis of the common-mode induced differential-mode distortion in Gm-C filters

In this paper, interdependency between differentialmode (DM) and common-mode (CM) signals in fully-differential (FD) Gm-C filters is investigated. It was found that although DM signals are signals of interest in FD circuit, CM signals have non-negligible influence on the DM signals and vice versa. Based on the perturbation concept and state-space representation, closed-form solution of the harmonic distortion of the FD Gm-C filter is derived and compared to the simulation results.

[1]  Alessandro Lo Schiavo,et al.  Perturbation analysis of nonlinear distortion in analog integrated circuits , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[2]  Slawomir Koziel,et al.  Dynamic range, noise and linearity optimization of continuous-time OTA-C filters , 2004, Proceedings of the 2004 11th IEEE International Conference on Electronics, Circuits and Systems, 2004. ICECS 2004..

[3]  W. M. Snelgrove,et al.  On the characterization and reduction of distortion in bandpass filters , 1998 .

[4]  Slawomir Koziel,et al.  A general approach to continuous‐time Gm‐C filters , 2003, Int. J. Circuit Theory Appl..

[5]  Bram Nauta,et al.  A CMOS transconductance-C filter technique for very high frequencies , 1992 .

[6]  J. J. Bussgang,et al.  Analysis of nonlinear systems with multiple inputs , 1974 .

[7]  Jirayuth Mahattanakul,et al.  Harmonic injection method: a novel method for harmonic distortion analysis , 2001, ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196).

[8]  Piet Wambacq,et al.  Distortion analysis of analog integrated circuits , 1998 .

[9]  G. Palumbo,et al.  High-frequency harmonic distortion in feedback amplifiers: analysis and applications , 2003 .

[10]  Paul-Peter Sotiriadis,et al.  State-space harmonic distortion modeling in weakly nonlinear, fully balanced G/sub m/-C filters-a modular approach resulting in closed-form solutions , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[11]  G. Palumbo,et al.  Distortion analysis in the frequency domain of a Gm-C biquad , 2007, 2007 18th European Conference on Circuit Theory and Design.

[12]  Y. Tsividis,et al.  Dynamic range optimization of weakly nonlinear, fully balanced, Gm-C filters with power dissipation constraints , 2003, IEEE Trans. Circuits Syst. II Express Briefs.