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PIERS Online
Vol. 4
No. 5
2008
pp: 571-575A Comparison of Distortion Analyses Based on Volterra Series and Steady State AlgorithmJosef Dobes doi:10.2529/PIERS080118170022 Downloads: 530 Abstract:The most accurate way for computing the distortion coefficients is to find a steady state period of the signal, and then to determine spectrum by means of fast Fourier transform. In the paper, main features of a reliable and efficient algorithm for determining the steady state are described. However, even such accelerated method often needs a time-consuming numerical integration over many periods of the faster signal. For this reason, an efficient method for a fast estimation of the main distortion coefficients is also presented which does not contain frequent imperfections in the algorithm implementations. The algorithm uses higher-order Volterra series in a simple multistep algorithm which is compatible with a typical structure of the frequency domain part of software tools. Both methods are compared by analyses of the main intermodulation products of a low-voltage low-power CMOS RF four-quadrant multiplier.References:1. Vlach, J. and K. Singhal, Computer Methods for Circuit Analysis and Design, Van Nostrand Reinhold Company, New York, 1982. 2. Dobes, J., D. Biolek, and P. Posolda, "An efficient steady-state analysis of microwave circuits," International Journal of Microwave and Optical Technology, Vol. 1, No. 2, 284-289, August, 2006. 3. Skelboe, S., "Computation of the periodic steady-state response of nonlinear networks by extrapolation methods," IEEE Trans. Circuits Syst., Vol. 27, 161-175, 1980. 4. Petrenko, A. I., A. I. Vlasov, and A. P. Timtschenko, Tabular Methods of Computer-aided Modeling, Higher School, Kiyv, 1977. 5. Dobes, J., "Reliable CAD analyses of CMOS radio frequency and microwave circuits using smoothed gate capacitance models," AEU --- International Journal of Electronics and Communications, Vol. 57, No. 6, 372-380, 2003. 6. Massobrio, G. and P. Antognetti, Semiconductor Device Modeling with SPICE, McGraw-Hill, New York, 1993. 7. Wambacq, P. and W. Sansen, Distortion Analysis of Analog Integrated Circuits, Kluwer Academic Publishers, Boston, 1998. 8. Salama, M. K. and A. M. Soliman, "Low-voltage low-power CMOS RF four-quadrant multiplier," AEU --- International Journal of Electronics and Communications, Vol. 57, No. 1, 74-78, 2003. |
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