A monolithic Sigma Delta A/D and D/A converter with filter for broad-band speech coding

Lerch R.G.; Lamkemeyer M.H.

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A monolithic Sigma Delta A/D and D/A converter with filter for broad-band speech coding

机译：具有滤波器的单片Sigma Delta A / D和D / A转换器，用于宽带语音编码

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摘要

The authors present a 5-V-only 14-b, 16 ksamples/s linear codec suitable as the audio part of a CCITT G722 codec. The device uses second-order sigma-delta modulation for both analog/digital (A/D) and digital/analog (D/A) conversion at 2.048 Msamples/s. A time-continuous modulator with integrated antialias filtering is used at the A/D side, obviating the need for an external antialiasing filter. The digital filters for decimation and interpolation are implemented with both a custom digital signal processor (DSP) and specialized hardware. The device was realized with 74000 transistors on a 31-mm/sup 2/ die in a 3- mu m SACMOS technology. A dynamic range of more than 80 dB and a passband ripple of 0.3 dB were attained with A/D and D/A paths in cascade.

机译：作者提出了仅5 V的14-b，16 ksamples / s线性编解码器，适合作为CCITT G722编解码器的音频部分。该器件使用二阶sigma-delta调制以2.048 Msamples / s的速率进行模拟/数字（A / D）和数字/模拟（D / A）转换。在A / D端使用集成了抗混叠滤波的时间连续调制器，从而无需外部抗混叠滤波器。用于抽取和内插的数字滤波器可通过定制数字信号处理器（DSP）和专用硬件来实现。该器件是在7毫米/ sup 2 /裸片上采用7μm晶体管，采用3微米SACMOS技术实现的。通过级联的A / D和D / A路径，可实现超过80 dB的动态范围和0.3 dB的通带纹波。

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《IEEE Journal of Solid-State Circuits》 |1991年第12期|P.1920-1927|共8页
作者
Lerch R.G.; Lamkemeyer M.H.;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类一般性问题;基本电子电路;
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专利

1. A transistor-only switched current sigma-delta A/D converter for a CMOS speech CODEC [J] . Nedved J., Vanneuville J. IEEE Journal of Solid-State Circuits . 1995,第7期

机译：用于CMOS语音编解码器的仅晶体管开关电流sigma-delta A / D转换器
2. A Fast, Sigma–Delta $(Sigma Delta)$ Boost DC–DC Converter Tolerant to Wide LC Filter Variations [J] . Keskar N. A., Rinc脫n-Mora G. A. IEEE transactions on circuits and systems. II, Express briefs . 2008,第2期

机译：快速的Sigma-Delta $（Sigma Delta）$升压DC-DC转换器，可耐受宽幅LC滤波器变化
3. Comb-Based Decimation Filters for $Sigma Delta$ A/D Converters: Novel Schemes and Comparisons [J] . Massimiliano Laddomada IEEE Transactions on Signal Processing . 2007,第期

机译：用于$ Sigma Delta $ A / D转换器的基于梳状的抽取滤波器：新颖的方案和比较
4. A Monolithic /spl Sigma//spl Delta/ A/D And D/A Converter With Filter For Broadband Speech Coding [C] . Lerch, R., Lamkemeyer, . 1991

机译：具有滤波器的单片/ spl Sigma // spl Delta / A / D和D / A转换器，用于宽带语音编码
5. Design, Fabrication and Testing of Monolithic Low-Power Passive Sigma-Delta Analog-To-Digital Converters [D] . Roy, Angsuman. 2016

机译：单片低功耗无源Sigma-Delta模数转换器的设计，制作和测试
6. Effects of Additional Low-Pass–Filtered Speech on Listening Effort for Noise-Band–Vocoded Speech in Quiet and in Noise [O] . Carina Pals, Anastasios Sarampalis, Mart van Dijk, -1

机译：额外的低通滤波语音对安静和噪声环境中带区语音编码的听力的影响
7. Design, Fabrication and Testing of Monolithic Low-Power Passive Sigma-Delta Analog-to-Digital Converters [O] . Roy Angsuman 2016

机译：单片低功耗无源sigma-Delta模数转换器的设计，制造和测试

A monolithic Sigma Delta A/D and D/A converter with filter for broad-band speech coding

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