Name
Title | ||
|---|---|---|
A first-order frequency-warped sigma delta modulator with improved signal-to-noise ratio |
Abstract | ||
|---|---|---|
A design procedure for first-order oversampling sigma delta modulators (SDM) is proposed, which incorporates a particular frequency warping. By warping the SDM noise transfer function with positive warping parameters, the out-of-band gain can be decreased and hence stability properties can be improved. Moreover, an appropriate choice of the corresponding warped SDM loop filters leads to a signal transfer function that provides a boost in the signal band, thereby yielding an increase in signal-to-noise ratio (SNR). This paper describes the design procedure and SNR analysis for two different first-order frequency-warped SDM topologies, which require only one additional multiplier compared to the traditional SDM structure. The most promising one of these topologies is compared with the traditional first-order SDM in computer simulations using sinusoidal test signals, and yields an SNR improvement of 6 dB. |
Year | Venue | Keywords |
|---|---|---|
2008 | Lausanne | sigma-delta modulation,transfer functions,sdm loop filter warping,sdm noise transfer function warping,snr analysis improvement,additional multiplier,design procedure,first-order oversampling frequency-warped sigma-delta modulators,out-of-band gain,positive warping parameters,signal transfer function,signal-to-noise ratio improvement,sinusoidal test signal band,stability property improvement |
Field | DocType | ISSN |
Topology,Image warping,Oversampling,Control theory,Signal-to-noise ratio,Network topology,Delta-sigma modulation,Multiplier (economics),Transfer function,Signal transfer function,Physics | Conference | 2219-5491 |
Citations | PageRank | References |
0 | 0.34 | 3 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ludovico Ausiello | 1 | 0 | 0.34 |
| Toon van Waterschoot | 2 | 157 | 14.29 |
| Marc Moonen | 3 | 3673 | 326.91 |