| 一种12位400 MHz电流开关型D/A转换器的设计 |
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| 引用本文： | 钟书鹏,谭年熊,沈延钊,廖青. 一种12位400 MHz电流开关型D/A转换器的设计[J]. 微电子学, 2006, 36(4): 476-479 |
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| 作者姓名： | 钟书鹏 谭年熊 沈延钊 廖青 |
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| 作者单位： | 清华大学,微电子学研究所,北京,100084 |
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| 摘 要： | 基于TSMC 0.25μm工艺、采用电流开关结构,设计了一个3.3 V 12位400 M采样率的D/A转换器。在电路中,设计了一种新的电压限幅结构,从而使其具有较好的动态性能。该D/A转换器在1 MHz输入信号下,无杂散动态范围(SFDR)达到83.75 dB;在12.5 MHz输入信号下,可获得70 dB的SFDR;在不同温度和工艺corner下,仿真得到的电路性能也都能达到上述指标。
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| 关 键 词： | 数模转换器 电流开关 无杂散动态范围 |
| 文章编号： | 1004-3365（2006）04-0476-04 |
| 收稿时间： | 2005-10-12 |
| 修稿时间： | 2005-10-122005-12-27 |
Design of a 12-Bit 400 MHz Current-Steering D/A Converter |
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| ZHONG Shu-peng,TAN Nick Nian-xiong,SHEN Yan-zhao,LIAO Qing. Design of a 12-Bit 400 MHz Current-Steering D/A Converter[J]. Microelectronics, 2006, 36(4): 476-479 |
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| Authors: | ZHONG Shu-peng TAN Nick Nian-xiong SHEN Yan-zhao LIAO Qing |
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| Affiliation: | Institute of Microelectronics , Tsinghua University, Beijing 100084, P. R. China |
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| Abstract: | A 3.3 V,12-bit 400 MHz D/A converter with current-steering structure is presented.A new voltage-limited latch is used in this work to improve the dynamic performance of the D/A converter.With an input sine wave signal of 1 MHz,a spurious-free dynamic range(SFDR) up to 83.75 dB is achieved,which is much better than the requirement of the 12-bit D/A converter.With a signal frequency of 12.5 MHz,a 70 dB SFDR is still available, which meets the requirement of the 12-bit D/A converter in different temperatures and process corners. |
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| Keywords: | D/A converter Current steering Spurious free dynamic range |
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