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

被引：0
|
作者：
Loulou, M [1 ]
Dallet, D [1 ]
Marchegay, P [1 ]
机构：
[1] Univ Bordeaux 1, CNRS UMR 5818, ENSERB, Lab Microelect IXL, F-33405 Talence, France
来源：
ISCAS 2000: IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS - PROCEEDINGS, VOL IV: EMERGING TECHNOLOGIES FOR THE 21ST CENTURY | 2000年
关键词：
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents a low pass sigma-delta modulator (Ca) 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 Ca 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 mu m AMS single poly CMOS process, shows 55dB dynamic range at 2MHz sampling rate with 8kHz input frequency bandwidth.
引用
收藏
页码：409 / 412
页数：4
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