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

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2 Author(s)
R. Naiknaware ; Dept. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA ; T. Fiez

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

Published in:

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on  (Volume:2 )

Date of Conference:

Jul 1999