The paper presents a fully integrated ultra-wide band(UWB)low noise amplifier(LNA)for 3-10 GHz applications.It employs self-biased resistive-feedback and current-reused technique to achieve wide input matching and low...The paper presents a fully integrated ultra-wide band(UWB)low noise amplifier(LNA)for 3-10 GHz applications.It employs self-biased resistive-feedback and current-reused technique to achieve wide input matching and low power characteristics.An improved biased architecture is adopted in the second stage to attain a better gain-compensation performance.The design is verified with TSMC standard 1 P6 M 0.18μm RF CMOS process.The measurement results show that the parasitic problem of the transistors at high frequencies is solved.A high and flat S21 of 9.7±1.5 dB and the lowest NF 3.5 dB are achieved in the desired frequency band.The power consumption is only 7.5 mA under 1.6 V supply.The proposed LNA achieves broadband flat gain,low noise,and high linearity performance simultaneously,allowing it to be used in 3-10 GHz UWB applications.展开更多
以哈氏黄瓜(Cucumis sativus var. hardwickii)为试验材料,基于全基因组测序结果,利用生物信息学分析方法,鉴定获得77个NAC转录因子,其结构高度保守,序列长度在151~653个氨基酸之间,在7条染色体中呈非均匀分布;理论等电点在4.54~9.10之...以哈氏黄瓜(Cucumis sativus var. hardwickii)为试验材料,基于全基因组测序结果,利用生物信息学分析方法,鉴定获得77个NAC转录因子,其结构高度保守,序列长度在151~653个氨基酸之间,在7条染色体中呈非均匀分布;理论等电点在4.54~9.10之间;大部分转录因子定位在细胞核和细胞质膜上;系统发生分析显示所有NAC转录因子聚类为6个亚家族,其中亚家族Ⅲ序列结构较为多样性;进化分析发现NAC转录因子存在片段重复和串联重复等复制模式,没有发生近代的全基因组复制事件,并在进化过程中受到纯化选择作用;NAC转录因子基因在哈氏黄瓜幼苗根中表达量最高,其次为雌花和叶片;荧光定量分析发现,低温处理下,检测的15个NAC基因中有12个显著上调表达,3个下调表达,并存在一组表达量差异明显的HdNAC32–Hd ANC47片段复制基因对。由此可知NAC转录因子在受低温胁迫的哈氏黄瓜中发挥重要的转录调控作用。展开更多
基金Supported by the National Natural Science Foundation of China(No.61534003,61874024,61871116)
文摘The paper presents a fully integrated ultra-wide band(UWB)low noise amplifier(LNA)for 3-10 GHz applications.It employs self-biased resistive-feedback and current-reused technique to achieve wide input matching and low power characteristics.An improved biased architecture is adopted in the second stage to attain a better gain-compensation performance.The design is verified with TSMC standard 1 P6 M 0.18μm RF CMOS process.The measurement results show that the parasitic problem of the transistors at high frequencies is solved.A high and flat S21 of 9.7±1.5 dB and the lowest NF 3.5 dB are achieved in the desired frequency band.The power consumption is only 7.5 mA under 1.6 V supply.The proposed LNA achieves broadband flat gain,low noise,and high linearity performance simultaneously,allowing it to be used in 3-10 GHz UWB applications.
文摘以哈氏黄瓜(Cucumis sativus var. hardwickii)为试验材料,基于全基因组测序结果,利用生物信息学分析方法,鉴定获得77个NAC转录因子,其结构高度保守,序列长度在151~653个氨基酸之间,在7条染色体中呈非均匀分布;理论等电点在4.54~9.10之间;大部分转录因子定位在细胞核和细胞质膜上;系统发生分析显示所有NAC转录因子聚类为6个亚家族,其中亚家族Ⅲ序列结构较为多样性;进化分析发现NAC转录因子存在片段重复和串联重复等复制模式,没有发生近代的全基因组复制事件,并在进化过程中受到纯化选择作用;NAC转录因子基因在哈氏黄瓜幼苗根中表达量最高,其次为雌花和叶片;荧光定量分析发现,低温处理下,检测的15个NAC基因中有12个显著上调表达,3个下调表达,并存在一组表达量差异明显的HdNAC32–Hd ANC47片段复制基因对。由此可知NAC转录因子在受低温胁迫的哈氏黄瓜中发挥重要的转录调控作用。
