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    1. USB ype C Specification

      标签：USB 3.1 Type C

      With the continued success of the USB interface, there exists a need to adapt USB technology to serve newer computing platforms and devices as they trend toward smaller, thinner and lighter form-factors. Many of these newer platforms and devices are reaching a point where existing USB receptacles and plugs are inhibiting innovation, especially given the relatively large size and internal volume constraints of the Standard-A and Standard-B versions of USB connectors. Additionally, as platform usage models have evolved, usability and robustness requirements have advanced and the existing set of USB connectors were not originally designed for some of these newer requirements. This specification is to establish a new USB connector ecosystem that addresses the evolving needs of platforms and devices while retaining all of the functional benefits of USB that form the basis for this most popular of computing device interconnects.

      下载次数 9次 资源类型 应用文档 上传时间 2015-03-31

    2. 板厂阻抗计算

      标签：阻抗

      随着信号传送速度迅猛的提高和高频电路的广泛应用，对 印刷电路板也提出了更高的要求。印刷电路板提供的电路 性能必须能够使信号在传输过程中不发生反射现象，信号 保持完整，降低传输损耗，起到匹配阻抗的作用，这样才 能得到完整、可靠、精确、无干扰、噪音的传输信号。 ? 阻抗匹配在高频设计中是很重要的，阻抗匹配与否关系到 信号的质量优劣。而阻抗匹配的目的主要在于传输线上所 有高频的微波信号皆能到达负载点，不会有信号反射回源 点。

      下载次数 0次 资源类型 应用文档 上传时间 2015-03-31

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