Sigma delta and multi-stage sigma delta modulation with inside loop dithering
- 1 January 1991
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1953-1956 vol.3
- https://doi.org/10.1109/icassp.1991.150771
Abstract
Dithering inside the loop of sigma-delta and multistage sigma-delta modulators is studied. It is shown under certain conditions that dithering inside the loop of the sigma-delta modulator has the effect of attenuating the discrete quantization error spikes. It does not make the quantization error white. For a multistage sigma-delta modulation system, inside-the-loop dithering makes the quantization error white for a system with three stages. Simulation results are presented to support the theoretical analysis.Keywords
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