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

摘要

In this paper, we present a single-path multi-bit delta-sigmananalog-to-digital converter (ΔΣ ADC) architecture that usesntime as a reference for performing multi-bit digital-to-analognconversion in the feedback path. The architecture uses anvoltage-controlled oscillator as a multi-bit quantizer. In the feedbacknpath of the ΔΣ ADC, the errors due to component mismatch arenavoided by using a single-path for all the levels in a multi-bitndigital-to-analog converter (DAC). The technique eliminates the need fornfeedback DAC architectures with static and dynamic component matching