Architecture design of multiplexed incremental analog-to-digital converters Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/rr1722933

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  • Analog-to-Digital Data Converters (ADCs) used in instrumentation andmeasurements often require high absolute accuracy
  • Analog-to-Digital Data Converters (ADCs) used in instrumentation andmeasurements often require high absolute accuracy, including excellent linearity andnegligible dc offset. Incremental data converters (IDCs) provide a solution for suchmeasurement applications. Since IDCs are essentially delta-sigma converterswith reset operation before each conversion, they retain most of the advantages ofconventional [delta sigma] converters, and yet they are capable of offset-free and accurateconversion.Most of the previous research on incremental converters is for single-channeland dc signal applications, where they can perform extremely accurate data conversionwith more than 20-bit resolution. In this thesis, the operation and the performance ofIDCs in both frequency and time domain is analyzed. Design techniques forimplementing multiplexed IDCs to convert narrow bandwidth ac signals are discussedtoo. It incorporates the operation principles, modulator topologies, digital filter designand signal-to-noise ratio optimization methodology. The theoretical analysis isverified by simulation results.
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