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PCB相关  计算FR4上的差分阻抗(PDF)

Calculation of the Differential Impedance of Tracks on FR4 substrates There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to ...

https://www.eeworm.com/dl/501/22297.html

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PCB相关  pci e PCB设计规范

This document provides practical, common guidelines for incorporating PCI Express interconnect layouts onto Printed Circuit Boards (PCB) ranging from 4-layer desktop baseboard designs to 10- layer or more server baseboard designs. Guidelines and constraints in this document are intended for use on b ...

https://www.eeworm.com/dl/501/22314.html

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电源技术  确保电解电容器的寿命长-LED灯泡为例

Abstract: Electrolytic capacitors are notorious for short lifetimes in high-temperature applications such asLED light bulbs. The careful selection of these devices with proper interpretation of their specifications isessential to ensure that they do not compromise the life of the end product. This ...

https://www.eeworm.com/dl/505/22678.html

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电源技术  LTP5900 Hardware Integration Guide

The LTP5900 includes sufficient power supply filtering and decoupling capacitancesuch that additional filtering should not be necessary for most battery-powereddesigns. Care must be taken to avoid large transient voltages on the supply as theM2510 steps up its current consumption (see the section ...

https://www.eeworm.com/dl/505/22732.html

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电源技术  零晶体管IC-IC设计一个新高度

Abstract: We can apply a BiCMOS integrated circuit with only resistors and no transistors to solve adifficult design problem. The mythically perfect operational amplifier&#39;s gain and temperature coefficient aredependent on external resistor values. Maxim precision resistor arrays are manufactur ...

https://www.eeworm.com/dl/505/22866.html

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电源技术  智能电网安全性

Abstract: The rapid build out of today&#39;s smart grid raises a number of security questions. In this article,we review two recent well-documented security breaches and a report of a security gap. These situationsinclude a 2009 smart-meter hack in Puerto Rico; a 2012 password discovery in grid di ...

https://www.eeworm.com/dl/505/23005.html

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电源技术  LED的电源管理

A light-emitting diode (LED) is a semiconductor device that emits narrow-spectrum incoherent light when forward-biased.The color of the emitted light depends on the chemical composition of the semiconductor material used, and can benear-ultraviolet, visible or infrared. LEDs are more prevalent tod ...

https://www.eeworm.com/dl/505/23069.html

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电源技术  电源工程师-电路设计中的英雄

Abstract: We don&#39;t expect manufacturers to produce clothes that in one size that fits everyone. In thesame way, one ESD component can&#39;t solve all issues&mdash;each application has different ESD requirements.Knowing that "one size fits all" cannot apply to power design, the power designer, ...

https://www.eeworm.com/dl/505/23206.html

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电源技术  智能电网安全保护

Abstract: Stuxnet, a sophisticated virus that damaged Iran&#39;s nuclear capability, should be an eye openerfor the world. We can choose to learn something very narrow (how to combat the Stuxnet virus) or wecan choose to focus on the larger goal of thwarting the next type of creative cyber attack. ...

https://www.eeworm.com/dl/505/23219.html

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电源技术  智能电表和智能电网手册

Abstract: Investment in smart meters and smart grid end equipment continues to grow worldwide as countriestry to make their electric delivery systems more efficient. However, as critical as the electric deliveryinfrastructure is, it is normally not secured and thus subject to attack. This article ...

https://www.eeworm.com/dl/505/23357.html

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