NDLI: A 3.3 V switched-current second order sigma-delta modulator for audio applications

Content Provider	IEEE Xplore Digital Library
Author	Loulou, M. Dallet, D. Marchegay, P.
Copyright Year	2000
Description	Author affiliation: Lab. de Microelectron., CNRS, Talence, France (Loulou, M.)
Abstract	This paper presents a low pass sigma-delta modulator (/spl Sigma//spl Delta/) for Analog-to-Digital conversion which uses the switched-current technique. The growth of this technique is limited by the clock feedthrough which induces an error on the output signal value. In order to cancel the effect of this phenomena a new method based on a current feedback loop is used. The /spl Sigma//spl Delta/ modulator implemented is a conventional second order and the whole circuit is designed with fully differential current mode building blocks. The circuit, designed in 0.8 /spl mu/m AMS single poly CMOS process, shows 55 dB dynamic range at 2 MHz sampling rate with 8 kHz input frequency bandwidth.
Starting Page	409
Ending Page	412
File Size	351444
Page Count	4
File Format	PDF
ISBN	0780354826
DOI	10.1109/ISCAS.2000.858775
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-05-28
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delta-sigma modulation Circuits Analog-digital conversion Clocks Feedback loop CMOS process Dynamic range Sampling methods Frequency Bandwidth
Content Type	Text
Resource Type	Article

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A 3.3 V switched-current second order sigma-delta modulator for audio applications