排序方式: 共有10条查询结果,搜索用时 609 毫秒
1
1.
2.
3.
设计了一种基于65 nm CMOS工艺的60 GHz功率放大器。采用共源共栅结构与电容中和共源级结构相结合的方式来提高功率放大器的增益,并采用两路差分结构来提高输出功率。采用片上变压器作为输入/输出匹配及级间匹配,以减小芯片的面积,从而降低成本。采用Cadence、ADS和Momentum等软件进行联合仿真。后仿真结果表明,在工作频段为60 GHz时,最大小信号增益为26 dB,最大功率附加效率为18.6%,饱和输出功率为15.2 dBm。该功率放大器具有高增益、高效率、低成本等优点。 相似文献
4.
A simple and accurate method for measuring program/erase speed in a memory capacitor structure 下载免费PDF全文
With the merits of a simple process and a short fabrication period, the capacitor structure provides a convenient way to evaluate memory characteristics of charge trap memory devices. However, the slow minority carrier generation in a capacitor often makes an underestimation of the program/erase speed. In this paper, illumination around a memory capacitor is proposed to enhance the generation of minority carriers so that an accurate measurement of the program/erase speed can be achieved. From the dependence of the inversion capacitance on frequency, a time constant is extracted to quantitatively characterize the formation of the inversion layer. Experimental results show that under a high enough illumination, this time constant is greatly reduced and the measured minority carrier-related program/erase speed is in agreement with the reported value in a transistor structure. 相似文献
5.
A simple and accurate method to measure program/erase speed in a memory capacitor structure 下载免费PDF全文
With the merits of simple process and short fabrication period, the capacitor structure provides a convenient way to evaluate memory characteristics of charge trap memory devices. However, the slow minority carrier generation in a capacitor often makes an underestimation of the program/erase speed. In this paper, illumination around a memory capacitor is proposed to enhance the generation of minority carriers so that an accurate measurement of the program/erase speed can be achieved. From the dependence of the inversion capacitance on frequency, a time constant is extracted to quantitatively characterize the formation of the inversion layer. Experimental results show that under a high enough illumination, this time constant is greatly reduced and the measured minority carrier related program/erase speed is in agreement with the reported value in a transistor structure. 相似文献
6.
7.
本文详细地研究了关键尺寸的继续微缩对三维圆柱形无结型电荷俘获存储器器件性能的影响。通过Sentaurus三维器件仿真器,我们对器件性能的主要评价指标进行了系统地研究,包括编程擦除速度和高温下的纵向电荷损失及横向电荷扩散。沟道半径的继续微缩有利于操作速度的提升,但使得纵向电荷损失, 尤其是通过阻挡层的纵向电荷损失,变得越来越严重。栅极长度的继续微缩在降低操作速度的同时将导致俘获电荷有更为严重的横向扩散。栅间长度的继续微缩对于邻近器件之间的相互干扰有决定性作用,对于特定的工作温度及条件其值需谨慎优化。此外,栅堆栈的形状也是影响电荷横向扩散特性的重要因素。研究结果为高密度及高可靠性三维集成优化提供了指导作用。 相似文献
8.
信息时代,翻转课堂教学模式将对国内教学改革产生一定的影响.翻转课堂要求学生课下自主学习内容,突出学生的主体地位,文章以计算机应用基础课程为例,分析翻转课堂的教学设计方式,以此促进翻转课堂在当代计算机教学中的应用. 相似文献
9.
全罗盘画面中的刻度线反走样技术 总被引:3,自引:1,他引:2
随着计算机及图形学技术的发展,座舱仪表对图形显示的质量提出了更高的要求.由于硬件系统采用的是光栅图形显示系统,罗盘画面旋转受光栅扫描显示器的限制存在着锯齿形失真、扭曲等走样现象.针对这个问题,通过分析走样现象产生的原因,采用Bresenham算法应用于罗盘刻度线的生成, 获得了明显的反走样效果.利用直线对称性和圆的对称性,提高了全罗盘画面的生成速度. 相似文献
10.
建立了检测细胞中嘌呤核苷酸(ATP、ADP、AMP、NAD+和NADP+)的超高效液相色谱-质谱(UPLC-MS)分析方法。采用KinetexTMHILIC柱(50 mm×4.6 mm,2.1μm)进行分离,对细胞样品的萃取方法、流动相组成及质谱参数进行优化。方法学确证表明:各待测物在1.0~100μmol/L范围内线性关系良好,相关系数(r)均大于0.99,平均回收率为95.7%~101.1%,相对标准偏差为1.2%~6.1%。本方法的灵敏度高、简便快速、重复性好,可用于细胞中能量代谢的研究。 相似文献
1