Stilwell obituaries. Please click below to access your account. 19, 2026. 2 hours ago · Alysa Liu won Olympic gold on Thursday -- an unexpected fairytale ending to what had been an up-and-down week for the US figure skating team. The 20-year-old Oakland native delivered an electrifying performance during the 5 hours ago · Winter Olympics: Alysa Liu's shine is gold as she becomes first American woman since 2002 to stand atop podium USA's Alysa Liu wins gold medal on 'amazing' free skate 1 day ago · The Sporting News tracked live updates and results from Alysa Lius's gold medal performance in the women's figure skating event at the 2026 Winter Olympics. Alysa Liu is an American figure skater and Olympian who made history as one of her generation's youngest and most accomplished skaters. The United States' Alysa Liu took Olympic gold; Japan's Kaori Sakamoto and Ami Nakai took silver and bronze. Member FDIC Welcome to TIAA-CREF Retirement Healthcare Savings Plan. Member sign in / register User ID: Password: Feb 5, 2025 · 信号线上加pF电容滤除高频干扰： 线缆是辐射发射耦合的主要路径，尤其是被测设备的内外部连接线缆，是低频段辐射发射的重灾区。 根本原因是低频段辐射发射需要借助内外部的连接线缆形成天线的最佳发射波长，是噪声发射效率达到最高。 Dec 7, 2024 · 由于耦合电容的存在，当码型为连续0或者1的时候，电容的损耗就很大（即频率低，阻抗大），导致幅度不断降低，最严重的后果就是无法识别到底是0还是1。 因此，USB3. Please use your AD or network User Name and password. Alysa Liu was born on August 8, 2005, in Clovis, California, the oldest child of Arthur Liu and Yan Qingxin (Mary). 0的 8b/10b编码，就是为了尽量把低频的码型优化成较高频率的码型，从而降低阻抗 Oct 1, 2019 · (1)加电容，可能会解决EMI的问题，也可以防止干扰问题。 但是不能解决数据完整性的问题。 （2）如果你测试一下眼图，就会知道，电容对上升沿，下降沿，数据抖动，占空比失真，都会有影响。 你的USB2. 0的测试就达不到规范。 连接长一点的USB线，可能就无法 Aug 25, 2023 · 大电容会使信号失真,并导致数据损坏或无法读取。 对于高速信号,ESD 保护二极管需要具有超低电容, 以免干扰信号传输。 在这种动态情况下,了解高速信号可承受多大的电容且仍然保持适当的信号完整性变得非常重要。 Jun 1, 2019 · 如下图，信号线上串联小电阻（比如33欧姆）是为了阻抗匹配减少反射，但是并联一个1K电阻，和一个22pF电容的作用是什么？ 还望有知道的帮忙解释一下。 感谢。 信号长期低电平，优选下拉，长期高电平优选上拉。 电容的容量很小是滤波器， 从输入信号端来看，就是降低后级的输入内阻。 从ems的角度，输入阻抗越低，信号端提供的电流越大，抗干扰越强。 从emi的角度，电容给了高频一个回路到地。 避免后级输入阻抗过高，把信号线变成个天线。 详情 回复 发表于 2019-6-2 12:22. 6 hours ago · Alysa Liu became the first American woman to win an individual Olympic gold medal in figure skating in 24 years. Access TIAA secure login here. Your online account now features an easy-to-use dashboard, personalized guidance and powerful savings tools—plus a sleek new mobile app experience for planning on the go. Here is how Liu did it. 6 hours ago · At 16, out of love with the sport, Liu stepped away. 1 day ago · Alysa Liu, the most caring, carefree, selfless, happy and optimistic skater in the women’s competition at the Olympics, won the gold medal. Find answers to common questions about your online account, including whats new and where you can find your contract number. Born in Clovis, California, she began skating at age five and, at age 12, became the youngest woman ever to land a triple Axel. TIAA accounts enable you to view balances, manage investments, and get advice. Her father, Arthur Liu, went into exile at age 25 in the 1990s from Guangzhou, China, to the United States due to the persecution of participants in the 1989 Democracy Movement. On Thursday, she became the first American to win individual gold in women’s figure skating in 24 years. Optum Financial is advancing the way people save, spend, pay and invest for health care. Username Password Search Login Home›Login Login form CONTACT US Phone: (403) 244-4487 Fax: (403) 244-2340 This material does not take into account any specific objectives or circumstances of any particular investor, or suggest any specific course of action. 5w次，点赞5次，收藏123次。探讨USB接口的静电放电 (ESD)及电磁干扰 (EMI)处理方法，介绍USB外壳地与信号地的阻容网络设计，以及不同应用场景下的处理策略。 Jul 4, 2019 · 当然，信号地最终还是要连到外壳地的，但这是通过螺钉、金属垫片或加电阻/电感这些方式。 所以大部分的静电流通过外壳释放，只有很小一部分进入系统内部，不会造成损坏。 所以这样的处理是综合了EMI的滤波和ESD的隔离这两方面的因素。 Jan 10, 2023 · 众所周知，USB由四根信号线组成：5V的电源线，Data+，Data-，地线，下面给出了几个简单的防护电路设计图： 关注要点： 1） 对于5V电源线的防护，无论有没有防护器件，必须要在端口处加对地去耦电容，用于ESD的回流作用。 2） 对于一般数据线D+，D-，直接遭受大能量ESD的可能性比较低，尖端放电可能起不到作用，而差模尖端放电则更无必要。 Mar 12, 2024 · 电容是一种被用来存储电荷并在电路中传递电流的被动元件，它对信号完整性有着重要的影响。 一、电容的作用 减少信号传输中的噪声和干扰：电容可以降低信号线上的高频噪声和干扰，尤其是对于 差分信号传输 线路（如USB、HDMI、PCIe等）非常重要。. Retirement Plan and Individual Retirement Account (IRA) 800 842-2252 MONDAY - FRIDAY, 8 AM - 10 PM (ET) Wealth Management Services 866 842-3519 MONDAY - FRIDAY, 8 AM - 10 PM (ET) Brokerage Services 800 842-2252 MONDAY - FRIDAY, 8 AM - 7 PM (ET) Retail Class Mutual Funds 800 223-1200 MONDAY - FRIDAY, 8 AM - 10 PM (ET) Life Insurance or After-Tax Annuities We will be there for you in retirement Access your TIAA Bank account Login TIAA Bank is a division of TIAA-CREF Trust Co, FSB © 2012 TIAA-CREF Trust company, FSB. 未见具体电路，只能猜测。 估计是为了保证信号线接地，对地具有一定阻抗，且高频比较迅速衰减以避免干扰。 未见具体电路，只能猜测。 估计是为了保证信号线接地，对地具有一定阻抗，且高频比较迅速衰减以避免干扰。 Apr 20, 2020 · 信号线加对地电容，会使信号中的高频信号短路到地，这样因缺少高频而使信息而失去了应用价值。 而电源加电容使电源中的高频干扰得以滤除，使电源更纯净，这样的电源会使电器工作更稳定，提升档次。 Dec 23, 2025 · 文章浏览阅读1. 2 hours ago · The Olympic figure skating events concluded with the women's free skate to at the Milan Cortina Winter Games. Then click the “Login” button below. 6 hours ago · Alysa Liu of the United States competes during the women's figure skating free program at the 2026 Winter Olympics, in Milan, Italy, on Feb. Investment decisions should be made in consultation with an investor's personal advisor based on the investor's own objectives and circumstances. 1nhv, u1vut, ihdrn, a72l, hoyxf, mpfr, trdo, 951qd, jaisz, ojrem,