| 并联谐振吸收网络在X波段MMIC LNA消除振荡中的应用 |
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| 引用本文： | 郝明丽, 刘训春, 黄清华, 杨浩, 王宇晨,.并联谐振吸收网络在X波段MMIC LNA消除振荡中的应用[J].电子器件,2007,30(3):811-814. |
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| 作者姓名： | 郝明丽 刘训春 黄清华 杨浩 王宇晨 |
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| 作者单位： | 中国科学院微电子研究所,北京,100029;中国科学院微电子研究所,北京,100029;中国科学院微电子研究所,北京,100029;中国科学院微电子研究所,北京,100029;中国科学院微电子研究所,北京,100029 |
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| 摘 要： | 为消除X波段单片集成(MMIC)低噪声放大器(LNA)设计中在低频端产生的振荡,提出了在第三级PHEMT管的栅极和地之间放置LC并联再串联电阻的吸收网络的方法.由于吸收网络与PHEMT管的输入电容组成的回路谐振在工作频带内的高频端,因此,降低了带外低频端的高增益,从而消除了多级级联LNA电路中由于低频端增益过高产生的振荡,而电路的噪声性能并没有明显变化.
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| 关 键 词： | X波段 MMIC LNA 低频振荡 |
| 文章编号： | 1005-9490（2007）03-0811-04 |
| 修稿时间： | 2006-05-23 |
Application of Parallel Resonant Absorbing Network for Elimination of Oscillation in X-Band MMIC LNA |
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| HAO Ming-li,LIU Xun-chun,HUANG Qing-hu,YANG Hao,WANG Yu-chen.Application of Parallel Resonant Absorbing Network for Elimination of Oscillation in X-Band MMIC LNA[J].Journal of Electron Devices,2007,30(3):811-814. |
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| Authors: | HAO Ming-li LIU Xun-chun HUANG Qing-hu YANG Hao WANG Yu-chen |
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| Affiliation: | Institute of Microelectronics, The Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | An effective method for eliminating low frequency oscillation in X-Band MMIC low noise amplifier(LNA) is proposed,that is,a parallel RLC resonant absorbing network is placed between gate electrode of PHEMT of the third stage and ground.Since the circuit composed of the absorbing network and the input capacitor of PHEMT resonates at high frequency point in working frequency band,as a result,the high gain of lower frequencies outside of working frequency band is reduced and low frequency oscillation is eliminated.Besides,the noise performance doesn't change evidently. |
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| Keywords: | low frequency oscillation X-band MMIC LNA |
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