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EfficientDeterminationofFeedbackDACErrors forDigitalCorrectionin ∆ΣA/Dconverters

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Abstract

converteraredeterminedbymeasuringtheidlechanneloutput and removing the DAC elements one by one. This method requires simple computation, does not add excess loop delay, andrequiresnoreconfigurationofthe ∆Σmodulator.Theerrors sodeterminedcanbeusedtocorrecttheoutputcodesinthe digitaldomainortheDACelementsintheanalogdomain.This techniqueisausefulalternativetothepopulardynamicelement matching at high speeds as excess delay cannot be tolerated andatlowoversamplingratioswhereDEMcanresultintones. Simulation results indicate that the correction values can be obtainedtoanaccuracythatissufficienttoreducenoiseand distortiontonearlyideallevels. I

Year: 2010
OAI identifier: oai:CiteSeerX.psu:10.1.1.178.3125
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