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Efficient hybrid continuous-time/discrete-time ΣΔ modulators for broadband wireless telecom systems

AuthorsGarcía-Sánchez, J. Gerardo ; Rosa, José M. de la
Issue Date2012
Citation3rd Doctoral Conference on Computing, Electrical and Industrial Systems (DOCEIS 2012)
AbstractThis work analyzes the use of hybrid continous-time/discrete-time SD modulators for the implementation of analog-to-digital converters intended for wideband mobile applications. Two alternative multirate cascade SD architectures are discussed and analyzed, taking into account the impact of main circuit-level error mechanisms, namely: mismatch, finite dc gain and gain-bandwidth product. Both multirate cascade SD modulators in terms of their sensitivity to non-ideal effects, considering different target specifications. Theoretical predictions match simulation results, showing that the lowest performance degradation is obtained by a new king of multi-rate hybrid SD modulators, in which the continuous-time circuits operate at a higher rate than the discrete-time parts of the modulators.
Appears in Collections:(IMSE-CNM) Comunicaciones congresos
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