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Study of Non-Linear S/H Operation in Switched-Current Circuits Using Volterra Series - Application to BandPass Sigma-Delta Modulators

 

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Opened Access Study of Non-Linear S/H Operation in Switched-Current Circuits Using Volterra Series - Application to BandPass Sigma-Delta Modulators
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Author: Rosa Utrera, José Manuel de la
Pérez Verdú, Belén
Medeiro Hidalgo, Fernando
Río Fernández, Rocío del
Rodríguez Vázquez, Ángel Benito
Department: Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Date: 2001
Published in: Proc. Design Circuits and Integrated Systems Conference (2001), p 1-6
Document type: Presentation
Abstract: This paper analyses the transient behaviour of SwItched-current (SI) memory cells placed at the front-end of high-speed A/D interfaces. Based on the Volterra series method, the non-linear sampling process occurring in such cells is studied and closed-form expressions are obtained for the Total Harmonic Distortion (THD) and the intermodulation distortion. The analysis is extended to the case of BandPass ΣΔ Modulators (BP-ΣΔMs) using Fully-Differential (FD) SI memory cells. As a result, the third-order intermodulation distortion at the output of the modulator is derived. Time-domain simulations and experimental measurements taken from a 0.8μm CMOS 4th-order BP-ΣΔM silicon prototype validate the study.
Cite: Rosa Utrera, J.M.d.l., Pérez Verdú, B., Medeiro Hidalgo, F., Río Fernández, R.d. y Rodríguez Vázquez, Á.B. (2001). Study of Non-Linear S/H Operation in Switched-Current Circuits Using Volterra Series - Application to BandPass Sigma-Delta Modulators. En Proc. Design Circuits and Integrated Systems Conference, Oporto (Portugal).
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URI: https://hdl.handle.net/11441/80103

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