• 06-29 2022
    Herry.Han
    The Frogbing system includes more than 400,000 items: (408176 ROW (s) Affected)  
  • 02-07 2022
    Herry.Han
    全文引用自: https://www.cnblogs.com/noryes/p/5716673.html 朔方 算法系列:日历算法 Copyright © 1900-2016, NORYES, All Rights Reserved. http://www.cnblogs.com/noryes/ 欢迎转载,请保留此版权声明。 ---------------------------------------------------------------------------------------     转载自http://blog.csdn.net/orbit/article/details/7749723 1、概述     日历在我们的生活中扮演着十分重要的角色,上班、上学、约会都离不开日历。每年新年开始,人们都要更换新的日历,你想知道未来一年的这么多天是怎么被确定下来的吗?为什么去年的国庆节是星期五而今年的国庆节是星期三?那就来研究一下日历算法吧。本文将介绍日历的编排规则,确定某日是星期几的计算方法,以及如何在计算机上打印某一年的年历。     要研究日历算法,首先要知道日历的编排规则,也就是历法。所谓历法,指的就是推算年、月、日的时间长度和它们之间的关系,指定时间序列的法则。我国的官方历法是中国公历,也就是世界通用...
  • 01-17 2022
    Herry.Han
    https://product.tdk.com.cn/zh/contact/faq/capacitors-0010.html 电桥测试时功能选择Cp(Cp-D)或Cs(Cs-D) 阻抗分析仪表可以测量称作Cp的并联电容或称作Cs的串联电容4。电路模式将取决于电容器的电容值(图1)。当C小而阻抗大时,C和Rp之间的并联阻抗将会明显高于Rs。因此用于测量电容量的仪表设置应为Cp。当C大而阻抗小时,C和Rp的并联阻抗不太大。因此,仪表设置应使用Cs来测量电容量。选择阻抗设置的一个好的经验规则是,对大于10kΩ的电容器阻抗值使用Cp,对小于10Ω的使用Cs。 图1: 阻抗等效电路...
  • 10-19 2021
    Herry.Han
    https://e2e.ti.com/blogs_/b/powerhouse/posts/how-to-reduce-acoustic-noise-of-mlccs-in-power-applications Other Parts Discussed in Post: TPS51622 Multilayer ceramic capacitors (MLCCs) are popular in power electronics designs compared to traditional polymer capacitors for many reasons: An MLCC provides: A small profile with relatively higher capacitance. Very low equivalent series resistance (ESR). Very low equivalent series inductance (ESL). Lower impedance at higher frequencies. Non-polarization for easier mounting and manufacturing. Higher reliability over time compared to tantalum and aluminum electrolyte capacitors. Lower unit costs. However, MLCCs do not always sit quietly on the board and do their job. Sometimes they get bored and start to “sing.” This is due to the piezoelectric effect of the ceramic material, which has the same characteristi...