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An anti-aliasing filter inspired by continuous-time Delta Sigma modulation

Boekbijdrage - Boekhoofdstuk Conferentiebijdrage

An anti-aliasing filter that incorporates a sampler is proposed to precede noise-shaping analog-to-digital converters (ADCs), such as discrete-time Δ Sigma modulators. The architecture of the proposed anti-aliasing filter is inspired by the implicit anti-aliasing filtering property of CT Δ Sigma modulators. However, contrary to CT Δ Sigma modulators, the proposed anti-aliasing filter is not sensitive to clock jitter. Furthermore, its key characteristics include: (1) higher suppression of aliases, compared to a Butterworth filter of the same order (same number of opamps); and (2) high-pass shaping of the sampling errors. Its performance advantages are derived theoretically and then confirmed through behavioural simulations.
Boek: 2008 15th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2008)
Pagina's: 854 - 857
Jaar van publicatie:2008