N-Path Filtering and Mixing Analysis—A General Approach Based on Fourier Transform - Archive ouverte HAL
Article Dans Une Revue IEEE Transactions on Circuits and Systems I: Regular Papers Année : 2024

N-Path Filtering and Mixing Analysis—A General Approach Based on Fourier Transform

Résumé

This article proposes a general approach to accurately model the N-path filters and mixers, with the double purpose of bringing a better insight in the frequency transposition phenomena and opening the door towards a more general discussion concerning NPF-NPM and their outstanding properties as passive circuits. Thanks to a Fourier transform analysis, some mathematical equations are rigorously derived for both filtering and mixing voltage gains. The analysis is compared with ideal simulations for various sets of parameters: source impedance Ra , load impedance RL , switch resistance Rsw , capacitive path CL . Some error curves are extracted validating the initial hypotheses for the model in a given range of capacitances values. As a proof of concept, it is shown that the model complies with the measurements results with very good accuracy. The error is less than 10.5 % on the two first harmonics prediction.
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hal-04656898 , version 1 (09-10-2024)

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Florence Podevin, Imadeddine Bendjeddou, Fadel Mohsen, Catalin Andrei Dobrin, Sana Ibrahim, et al.. N-Path Filtering and Mixing Analysis—A General Approach Based on Fourier Transform. IEEE Transactions on Circuits and Systems I: Regular Papers, In press, ⟨10.1109/TCSI.2024.3426297⟩. ⟨hal-04656898⟩

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