RF pcb design射频电路板设计基本规则
RF pcb design射频电路板设计基本规则 1.所有的元件尽可能的表贴 2.sirf reference典型的四，...
2010-03-21 3179
华为首家完成工信部TD-LTE外场第一阶段测试
华为首家完成工信部TD-LTE外场第一阶段测试 3月18日消息，华为今日宣布，华为已于近日首家全面完成工业和信息化部组织的T...
2010-03-21 770
RS274D与RS274X 的差异性比较
RS274D与RS274X 的差异性比较 GERBER FILE 目前常见到的有二种格式 RS-274D 及 RS-274X . 在CAM软件中,这二种格式都有支援,这二种格式的最大分别,在于RS-274X 内...
2010-03-09 8167
基于TOPSwitCh的电磁兼容性设计
采用TOPSwitCh的电磁兼容性原理设计 本文运用TOP224Y构成一款30W反激变换电路，对其进行了电磁兼容分析，并在多个方面实施EMC...
2010-03-06 1148
Layout Guidelines with Example
Layout Guidelines with Example Layout for the MAX16922 PMIC Abstract: This application note explains how to layout a standard MAX16922 automotive PMIC (power-management IC) to maximize perfor...
2010-02-21 2588
接地问题大全
接地问题大全 问：我已看过你们的“产品说明”(data sheets)和“应用笔记”(appl ication notes)，也参加过你们的技术讲座，但有关如...
2010-01-04 1903
如何处理变频电路中电磁辐射引起的干扰
如何处理变频电路中电磁辐射引起的干扰 变频器带来大经济效益同时也带来许多负面影响，变频电路产生电磁辐射可以造成其他通信设备及电子设备干扰。1. ...
2010-01-04 2335
高频PCB设计过程中的电源噪声的分析及对策
高频PCB设计过程中的电源噪声的分析及对策 在高频PCB板中，较重要的一类干扰便是电源噪声。笔者通过对高频PCB板上出现的电源噪声特性和产生原因进行系统分析，并...
2010-01-02 1416
What range of dielectric const
Problem What range of dielectric constants you could be realize with your PCB materials? Solution All of our material has a 4.7 dielectric constant...
2009-12-29 811
What is the copper plating thi
What is the copper plating thickness? Solution 1 ounce copper is 1.3 to 2.0 Mil thick2 ounce copper is 2.6 to 4.0 Mil thick ...
2009-12-29 1002
Can I have surface mounts?
Can I have surface mounts? Problem surface mounts Solution Surface mounts are not a problem for PCB123™. There is no add...
2009-12-29 755
Will you fab (cut/route) my pa
Problem Will you fab (cut/route) my panelized boards? Solution We do offer the precise routing feature on our PCB123™ services, routed to mos...
2009-12-29 737
What is the maximum temperatur
Problem What is the maximum temperature your PCB can handle? Solution 130 Degrees C.266 Degrees F. Details:...
2009-12-29 677
What is the minimum space betw
What is the minimum space between a pair of tracks on a PCB that could be manufactured? Problem What is the minimum space between a pair of tracks on a PCB that could be ma...
2009-12-29 1075
I would like to calculate the
I would like to calculate the trace width to impedance Problem I am working on a four layer circuit board that will contain some RF traces and would like to know the layer stack-up and spacing that ...
2009-12-29 980
盲埋孔的走线方法
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2009-12-19 3305
盲埋孔的设置
盲埋孔的设置 设置Via类型• 点击菜单的Setup－Pad Stacks，再选择Pad Stack Type中的Via选项，出现如右图设置对话框。• 点击...
2009-12-19 2671
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