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Time-referenced single-path multi-bit ΔΣ ADC using a VCO based quantizer

TitleTime-referenced single-path multi-bit ΔΣ ADC using a VCO based quantizer
Publication TypeConference Paper
Year of Publication1999
AuthorsNaiknaware, R., and T. S. Fiez
Conference NameIEEE International Symposium on Circuits and Systems
Pagination33 - 36
Date Published05/1999
Conference LocationOrlando, FL

In this paper, we present a novel single-path multi-bit delta-sigma analog-to-digital converter (ΔΣ ADC) architecture that uses time as a reference for performing multi-bit digital-to analog conversion in the feedback path. The architecture uses a voltage-controlled oscillator (VCO) as a multi-bit quantizer. In the feedback path of the ΔΣ ADC, the errors due to component mismatch are avoided by using a single-path for all the levels in a multi bit digital to-analog converter (DAC). The technique eliminates the need for feedback DAC architectures with static and dynamic component matching.