Publication | Closed Access
A quadrature data-dependent DEM algorithm to improve image rejection of a complex ΣΔ modulator
19
Citations
3
References
2002
Year
Unknown Venue
Sampling (Signal Processing)EngineeringImage RejectionMixed-signal Integrated CircuitAnalog DesignComputer EngineeringComplex σδ ModulatorComputational ImagingInverse ProblemsData-dependent Dem AlgorithmQuadrature BitstreamsSignal ProcessingNoise ReductionAnalog-to-digital ConverterQuadrature Feedback Paths
A data-dependent DEM algorithm is controlled by the quadrature bitstreams of a complex /spl Sigma//spl Delta/ modulator. The quadrature feedback paths of the modulator are dynamically matched, without increasing the in-band noise. Test chips with an initial 20% mismatch have a typical image rejection ratio of 61 dB with DEM.
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