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

Author

Naiknaware, Ravindranath ; Tang, Haiming ; Fiez, Terri S.

Author_Institution

Maxim Integrated Products, Austin, TX, USA

Volume

47

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

596

Lastpage

602

Abstract

In this paper, we present a 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 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

Keywords

circuit feedback; quantisation (signal); sigma-delta modulation; voltage-controlled oscillators; VCO-based quantizer; component mismatch; feedback path; multi-bit quantizer; sigma-delta ADC; time-referenced single-path multi-bit convertor; voltage-controlled oscillator; Analog-digital conversion; Bandwidth; Counting circuits; Digital-analog conversion; Feedback; Noise shaping; Quantization; Sampling methods; Semiconductor device noise; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.850418

Filename

850418