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技术白皮书及应用说明
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矢量网络分析的基本原理
网络分析是指设计制造人员和制造厂家对较复杂系统中所用元件和电路的电气性能进行测量的过程。当这些系统传送具有信息内容的信号时,我们关心的是如何以最高效率和最小失真使信号从一处传递到另一处。矢量网络分析是通过测量元件对频率扫描和功率扫描测试信号的幅度与相位的影响来精确表征元件特性的一种方法。
时间:2019-05-12
OSA为何能比光通道监测仪更好的进行频谱分析
有两类仪表可进行频谱分析:光谱分析仪(OSA)等便携式设备,以及内置在传输系统中、可通过网元管理系统(EMS)访问的频 谱分析功能模块,后者也被称为光通道监测仪(OCM)或光性能监测仪(OPM)。这两类设备在 性能(精度、测量值范围等)以及如何测量功率、波长和OSNR方面存在重大差异。本文将着重 探讨这些差异以及它们对网络性能评估造成的影响。
时间:2019-05-12
使用 20GHz网络分析仪进行 UWB 天线测量
超宽带(UWB) 是一项快速发展的技术,它用于传输大带宽 (>500 MHz)范围内的信息,以便进行短距离、宽带宽通信。本文讨论了使用20GHz ENA网络分析仪进行UWB天线测量 的优势,并给出了使用 ENA 选通功能的测量实例。
时间:2019-05-11
使用网络和阻抗分析仪评测 13.56 MHz RFID 标签和 阅读器/记录器
RFID,也称为非接触 IC 卡或 ID 标签,能够检测和识别特定目标,而无需与目标直接接触。自 20 世纪 90 年代中期以来,RFID 体积加速小型化,现已得到了广泛使用,并且目前已经出 现了一些定义RFID频率、通信方法和目的的标准。本文针对批量生产的13.56MHz RFID标签 和阅读器 / 记录器及其元器件,概述了评测其电气特征的方法。
时间:2019-05-11
ENA 系列 RF 网络分析仪夹具仿真器功能介绍
RF 工程师通常需要对 测量到的 S 参数进行处理,这主要是因为 RF 网络分析仪只能在严格定义的 50 Ω 单端同轴接口上测量,而现在的 RF 元器件为适应对更小尺寸、更小 功耗、更低价格等越来越高的要求而采用各种有别于同轴接口的不同的结 构形式。夹 具 仿 真 器 是 E N A 系 列 网 络 分 析 仪 的内置功能,它能显著简化和加快对测量数据的后处理工作。
时间:2019-05-11
CMOS 器件电性表征的全面解决方案B1500A半导体器件分析
改进CMOS器件性能的主要挑战来自两个相悖的目标: 高速和低耗。为同时实现这 两个目标,研究人员需要全面表征 MOSFET 器件参数。不仅要表征静态特性,而 且还要表征器件的动态特性和与时间相关的特性。近20年来,Keysight 4155和4156半导体参数分析仪始终是工业界的标准仪器。 B1500A半导体器件分析仪更是具有精确表征先进CMOS器件所需测量能 力的新一代半导体参数分析仪。
时间:2019-05-11
超低直流电流MOSFET晶圆级表征
纳米器件正常运行需要较低的信号级和较低的功率级。要表征此类器件及其半导体制程,能否 采用精确的低电流测量至关重要。Keysight B1500A半导体器件分析仪支持sub fA范围内的电流 测量,因此能够满足上述要求。本应用指南将介绍如何使用 B1500A 的超低电流测量能力精确评 估 MOSFET 的亚阈值特性。
时间:2019-05-11
汽车中功率器件的测试挑战和解决方案
本技术概述简要探讨了汽车电子系统、其面临的挑战以及汽车电子工程师为应对此类挑战而需采用的工具。结尾部分介绍了是德科技为了应对此类挑战而推出的解决方案。
时间:2019-05-11
精确测量低功耗蓝牙 ® 设备的电流曲线
CX3300 系列器件电流波形分析仪使您可以观察此前无法测量或检测的宽带低电平电流波形。其主机拥有2 个 或 4 个通道,可以接收来自电流传感器的信号,并能以最高 1 GSa/s 的采样率和 14 位或 16 位的宽动态范围将 信号数字化。它还拥有三种电流传感器,凭借最高 200 MHz 的带宽,可检测从 150 pA 到高达 10 A 的大范围动 态电流。
时间:2019-05-11
使用 CX3300 精确测量非易失性存储器件的电流波形
Keysight CX3300 器件电流波形分析仪,凭借其独特的超宽带小电流传感技术,可使您以互动方式快速观察 持续时间小于 μs、幅度低于 μA 的电流波形。这些正是研究器件特性和阻抗变化机理所需要的功能。CX3300 支持的电流传感器覆盖从 100 pA 到 10 A 的广泛量程,同时在 2 通道或 4 通道主机型号上拥有 1 GSa/s 采样 率、200 MHz 带宽、14/16 位动态范围和 256 Mpts 存储器深度。功能强大的动态电流测量功能使您可以分析 和调试 NVM 器件特征。本应用指南
时间:2019-05-11
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CONNECT:[ UseTime:0.000753s ] mysql:host=127.0.0.1;port=3306;dbname=itwangjian;charset=utf8
SHOW FULL COLUMNS FROM `qing_category` [ RunTime:0.001182s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 11 AND `status` = 1 ORDER BY `listorder` ASC [ RunTime:0.000409s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 12 AND `status` = 1 ORDER BY `listorder` ASC [ RunTime:0.000369s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 13 AND `status` = 1 ORDER BY `listorder` ASC [ RunTime:0.000230s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 39 AND `status` = 1 ORDER BY `listorder` ASC [ RunTime:0.000179s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 0 ORDER BY `listorder` ASC [ RunTime:0.000263s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 1 ORDER BY `listorder` ASC [ RunTime:0.000176s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 11 ORDER BY `listorder` ASC [ RunTime:0.000146s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 12 ORDER BY `listorder` ASC [ RunTime:0.000159s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 13 ORDER BY `listorder` ASC [ RunTime:0.000148s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 14 ORDER BY `listorder` ASC [ RunTime:0.000142s ]
SELECT `id`,`cate_name`,`parent_id`,`index_template` FROM `qing_category` WHERE `parent_id` = 39 ORDER BY `listorder` ASC [ RunTime:0.000141s ]
SHOW FULL COLUMNS FROM `qing_ad` [ RunTime:0.000792s ]
SELECT * FROM `qing_ad` WHERE `type_id` = 4 [ RunTime:0.000225s ]
SHOW FULL COLUMNS FROM `qing_config` [ RunTime:0.000732s ]
SELECT `value`,`id` FROM `qing_config` [ RunTime:0.000180s ]
SELECT * FROM `qing_category` WHERE `id` = 34 LIMIT 1 [ RunTime:0.000353s ]
SELECT * FROM `qing_ad` WHERE `type_id` = 2 ORDER BY `listorder` ASC [ RunTime:0.000414s ]
SHOW FULL COLUMNS FROM `qing_archives` [ RunTime:0.000784s ]
SELECT COUNT(*) AS think_count FROM `qing_archives` WHERE `cate_id` = 34 LIMIT 1 [ RunTime:0.000335s ]
SELECT * FROM `qing_archives` WHERE `cate_id` = 34 ORDER BY `id` DESC LIMIT 0,10 [ RunTime:0.001089s ]
SELECT `id`,`parent_id`,`cate_name`,`index_template` FROM `qing_category` WHERE ( id=34 ) LIMIT 1 [ RunTime:0.000432s ]
SELECT `id`,`parent_id`,`cate_name`,`index_template` FROM `qing_category` WHERE ( id=21 ) LIMIT 1 [ RunTime:0.000252s ]
SELECT `id`,`parent_id`,`cate_name`,`index_template` FROM `qing_category` WHERE ( id=39 ) LIMIT 1 [ RunTime:0.000221s ]
SELECT * FROM `qing_category` WHERE `parent_id` = 21 [ RunTime:0.000316s ]
0.092738s