| 采用改进电流调制功耗缩放的精度和速度可编程流水线模数转换器 |
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| 引用本文： | 魏琦,殷秀梅,杨斌,杨华中. 采用改进电流调制功耗缩放的精度和速度可编程流水线模数转换器[J]. 半导体学报, 2008, 29(5): 1010-1015 |
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| 作者姓名： | 魏琦 殷秀梅 杨斌 杨华中 |
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| 作者单位： | 清华大学电子工程系,电路与系统教研室,北京,100084;清华大学电子工程系,电路与系统教研室,北京,100084;清华大学电子工程系,电路与系统教研室,北京,100084;清华大学电子工程系,电路与系统教研室,北京,100084 |
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| 摘 要： | 介绍了一个精度和速度可编程、但不需要改变运算放大器偏置电流的流水线模数转换器,实现了8～11bit和400k～40MSa/s的程控范围.提出了一种新颖的预充型开关运放,在降低功耗的同时,可以使运算放大器快速开启.通过采用改进的电流调制功耗缩放技术、新颖的开关运放技术、采样保持电路消去技术和动态比较器,大大降低了电路的功耗.电路设计采用1.8V 1P6M 0.18μm CMOS工艺,仿真结果表明:在11bit,40MSa/s性能条件下,输入信号为19.02MHz时,无杂散动态范围(SFDR)为81dB,信噪失真比(SNDR)为67dB,功耗为29mW.
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| 关 键 词： | 流水线 模数转换器 开关运算放大器 |
| 文章编号： | 0253-4177(2008)05-1010-06 |
| 收稿时间： | 2007-09-28 |
| 修稿时间： | 2007-12-04 |
A Novel Sampling Precision and Rate Programmable Pipeline ADCwith Improved Current Modulated Power Scaling |
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| Wei Qi,Yin Xiumei,Yang Bin and Yang Huazhong. A Novel Sampling Precision and Rate Programmable Pipeline ADCwith Improved Current Modulated Power Scaling[J]. Chinese Journal of Semiconductors, 2008, 29(5): 1010-1015 |
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| Authors: | Wei Qi Yin Xiumei Yang Bin Yang Huazhong |
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| Affiliation: | Circuits and Systems Laboratory,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Circuits and Systems Laboratory,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Circuits and Systems Laboratory,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Circuits and Systems Laboratory,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | A conversion-precision and sampling-rate programmable pipeline analog-to-digital converter (ADC),without adjusting the bias current of operational amplifiers,is presented in this paper.This ADC achieves a conversion-precision of 8 to 11bits and a sampling-rate from 400k to 40MSa/s.To increase the power-on speed and reduce the power consumption,a novel pre-charged switched operational amplifier is proposed.The power can be significantly reduced by adopting an improved current modulated power scaling (CMPS) t... |
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| Keywords: | pipeline ADC switched operational amplifier |
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