CN1960600A - 印刷电路板 - Google Patents

印刷电路板 Download PDF

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Publication number
CN1960600A
CN1960600A CNA200510101029XA CN200510101029A CN1960600A CN 1960600 A CN1960600 A CN 1960600A CN A200510101029X A CNA200510101029X A CN A200510101029XA CN 200510101029 A CN200510101029 A CN 200510101029A CN 1960600 A CN1960600 A CN 1960600A
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pad
crystal oscillator
circuit board
clock generator
printed circuit
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CN100490604C (zh
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张海云
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CNB200510101029XA priority Critical patent/CN100490604C/zh
Priority to US11/309,629 priority patent/US7449969B2/en
Publication of CN1960600A publication Critical patent/CN1960600A/zh
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H05K1/0243—Printed circuits associated with mounted high frequency components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/023—Reduction of cross-talk, noise or electromagnetic interference using auxiliary mounted passive components or auxiliary substances
    • H05K1/0231—Capacitors or dielectric substances
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/0929—Conductive planes
    • H05K2201/093—Layout of power planes, ground planes or power supply conductors, e.g. having special clearance holes therein
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09663—Divided layout, i.e. conductors divided in two or more parts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10075—Non-printed oscillator
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
    • H05K2201/10621—Components characterised by their electrical contacts
    • H05K2201/10689—Leaded Integrated Circuit [IC] package, e.g. dual-in-line [DIL]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3447—Lead-in-hole components

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

一印刷电路板，包括一信号层、一位于信号层下方的电源层和一接地层，所述信号层上设有一晶振焊盘、一时钟发生器芯片焊盘以及两个电容焊盘，两条信号线将所述晶振焊盘和所述时钟发生器芯片焊盘连接在一起，所述信号线还将所述晶振焊盘和所述两个电容焊盘连接在一起，所述电源层被一电源分割线分割为具有不同电压两个电源区域，所述电源分割线位于所述晶振焊盘和时钟发生器芯片焊盘的一侧。

Description

印刷电路板
【技术领域】
本发明涉及一印刷电路板，尤其是一种提高晶振频率稳定性的印刷电路板。
【背景技术】
石英晶体振荡器简称晶振是高精度和高稳定度的振荡器，被广泛应用于电视、计算机、遥控器等各类振荡电路中，以及在通信系统中用作频率发生器、为数据处理设备产生时钟信号和为特定系统提供基准信号。由于晶振具有小型化、高精度、高稳定度、低噪声、高频化、低功耗、快速启动等特点，还被应用于计算机主板上，与系统时钟发生器芯片连接在一起，晶振产生高频脉冲波，输入到时钟发生器芯片内，经过整形与分频，然后提供计算机所需要的各种频率。
如图1所示，一现有印刷电路板的信号层1’上设有一晶振焊盘11’，邻近所述晶振焊盘11’设有一时钟发生器芯片焊盘12’，所述晶振焊盘11’与所述时钟发生器芯片焊盘12’之间设有两个电容焊盘14’和15’。所述晶振焊盘11’具有两个过孔111’和112’，用来插接晶振(图未示)的两个引脚，晶振为插接式元件。从所述过孔111’和112’引出的两条信号线17’和16’分别经过电容焊盘14’和15’连接至所述时钟发生器芯片焊盘12’。所述信号线16’和17’的线宽约为5mil。所述印刷电路板1的电源层位于信号层下方并被电源分割线31’分割为具有不同电源电压的区域，所述电源分割线31’位于所述晶振焊盘11’的正下方，两种不同电源电压会对晶振的工作造成干扰，使晶振的频率不稳定，从而影响计算机系统的时钟频率。
【发明内容】
有鉴于此，有必要提供一种能提高晶振频率稳定性的印刷电路板。
一印刷电路板，包括一信号层、一位于信号层下方的电源层和一接地层，所述信号层上设有一晶振焊盘、一时钟发生器芯片焊盘以及两个电容焊盘，两条信号线将所述晶振焊盘和所述时钟发生器芯片焊盘连接在一起，所述信号线还将所述晶振焊盘和所述两个电容焊盘连接在一起，所述电源层被一电源分割线分割为具有不同电压两个电源区域，所述电源分割线位于所述晶振焊盘和时钟发生器芯片焊盘的一侧。
相较现有技术，所述印刷电路板上晶振工作频率具有较高的稳定性。
【附图说明】
下面结合附图及具体实施方式对本发明作进一步的详细说明。
图1是现有技术印刷电路板信号层以及电源分割线的结构图。
图2是石英晶体振荡器的电路原理图。
图3是本发明印刷电路板的截面图。
图4是本发明印刷电路板信号层以及电源分割线较佳实施方式的结构图。
【具体实施方式】
请参考图2，石英晶体振荡器的电路包括一晶振20、一时钟发生器芯片30、两个接地滤波电容40和50。所述晶振20与时钟发生器芯片30相连，且所述晶振20的两端分别连接所述接地滤波电容40和50。所述晶振20将会产生一系列高频脉冲波，这些原始的脉冲波再输入到时钟发生器芯片30内，经过整形与分频，然后分配给计算机需要的各种频率。
再请参考图3，一印刷电路板包括上下两信号层1、一电源层2和一接地层3。
请继续参考图4，所述印刷电路板的信号层1上设有一晶振焊盘11、一时钟发生器芯片焊盘12以及两个电容焊盘14和15。所述两个电容焊盘14和15位于晶振焊盘11和时钟发生器芯片焊盘12之间。所述晶振焊盘11具有两个过孔111和112，所述电容焊盘14具有两个小焊盘141和142，所述电容焊盘15也具有两个小焊盘151和152。所述时钟发生器芯片焊盘12由两排若干个小焊盘组成。两条信号线16和17分别连接所述晶振焊盘11的过孔112、111和所述时钟发生器芯片焊盘12的两个小焊盘，所述信号线16和17还分别经过所述电容焊盘14和15的小焊盘141和151。所述电容焊盘14和15的另一小焊盘142和152经由信号线接地。所述印刷电路板信号层1下方的电源层2被一电源分割线31分成两个电源区域，所述电源分割线31位于所述晶振焊盘11和时钟发生器焊盘12下方的一侧。所述信号线16和17的线宽约为10mil。
由于所述印刷电路板电源层3的电源分割线31绕开了所述晶振焊盘11，且所述信号线16和17的线宽达到10mil，因此当所述印刷电路板1上安装晶振进行工作后，所述晶振的工作频率的稳定性得到很大的提高。

Claims (4)

1.一印刷电路板，包括一信号层、一位于信号层下方的电源层和一接地层，所述信号层上设有一晶振焊盘、一时钟发生器芯片焊盘以及两个电容焊盘，两条信号线将所述晶振焊盘和所述时钟发生器芯片焊盘连接在一起，所述信号线还将所述晶振焊盘和所述两个电容焊盘连接在一起，所述电源层被一电源分割线分割为具有不同电压两个电源区域，其特征在于：所述电源分割线位于所述晶振焊盘和时钟发生器芯片焊盘的一侧。
2.如权利要求1所述的印刷电路板，其特征在于：所述两条信号线的线宽约为10mil。
3.如权利要求1所述的印刷电路板，其特征在于：所述晶振焊盘设有两个过孔，所述两条信号线从所述过孔引出。
4.如权利要求1所述的印刷电路板，其特征在于：每一电容焊盘设有两个小焊盘，所述两条信号线分别经过每一电容焊盘的一个小焊盘，每一电容焊盘的另一小焊盘经由信号线接地。
CNB200510101029XA 2005-11-04 2005-11-04 印刷电路板 Expired - Fee Related CN100490604C (zh)

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CNB200510101029XA CN100490604C (zh) 2005-11-04 2005-11-04 印刷电路板
US11/309,629 US7449969B2 (en) 2005-11-04 2006-09-01 Printed circuit board

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Application Number Priority Date Filing Date Title
CNB200510101029XA CN100490604C (zh) 2005-11-04 2005-11-04 印刷电路板

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CN1960600A true CN1960600A (zh) 2007-05-09
CN100490604C CN100490604C (zh) 2009-05-20

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Cited By (7)

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CN101431860B (zh) * 2007-11-07 2010-07-28 英业达股份有限公司 时脉产生器
CN101976543A (zh) * 2009-12-31 2011-02-16 四川虹欧显示器件有限公司 驱动控制电路模组及其等离子显示屏
CN103716981A (zh) * 2013-12-30 2014-04-09 惠州Tcl家电集团有限公司 稳定时钟信号的pcb及其布线方法
CN106879168A (zh) * 2017-04-24 2017-06-20 广东欧珀移动通信有限公司 一种印刷电路板、pcba板以及电子设备
CN112739052A (zh) * 2020-12-02 2021-04-30 上海伟世通汽车电子系统有限公司 一种pcb板晶振布线方法
WO2021139705A1 (zh) * 2020-01-07 2021-07-15 Oppo广东移动通信有限公司 晶体振荡装置、射频模组和电子设备
CN114040566A (zh) * 2021-11-15 2022-02-11 无锡江南计算技术研究所 一种针对电源模块噪声抑制的pcb电路板

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CN111182714B (zh) * 2020-01-17 2021-02-12 西安联飞智能装备研究院有限责任公司 无人机电路布设结构

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TW483293B (en) 2000-11-10 2002-04-11 Via Tech Inc Circuit daughter board and circuit board structure for stabilizing power source and strengthening grounding
FI20002682A0 (fi) * 2000-12-07 2000-12-07 Micro Analog Syst Oy Menetelmä kideoskillaattorin valmistamiseksi ja kideoskillaattori
KR20030055681A (ko) * 2001-12-27 2003-07-04 삼성전기주식회사 온도보상형 수정발진기 및 그 제조방법
JP2005223395A (ja) * 2004-02-03 2005-08-18 Toyo Commun Equip Co Ltd 高安定圧電発振器
JP4707095B2 (ja) * 2005-05-09 2011-06-22 ルネサスエレクトロニクス株式会社 半導体回路

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101431860B (zh) * 2007-11-07 2010-07-28 英业达股份有限公司 时脉产生器
CN101976543A (zh) * 2009-12-31 2011-02-16 四川虹欧显示器件有限公司 驱动控制电路模组及其等离子显示屏
CN101976543B (zh) * 2009-12-31 2013-03-20 四川虹欧显示器件有限公司 驱动控制电路模组及其等离子显示屏
CN103716981A (zh) * 2013-12-30 2014-04-09 惠州Tcl家电集团有限公司 稳定时钟信号的pcb及其布线方法
CN103716981B (zh) * 2013-12-30 2017-11-17 惠州Tcl家电集团有限公司 稳定时钟信号的pcb及其布线方法
CN106879168A (zh) * 2017-04-24 2017-06-20 广东欧珀移动通信有限公司 一种印刷电路板、pcba板以及电子设备
WO2021139705A1 (zh) * 2020-01-07 2021-07-15 Oppo广东移动通信有限公司 晶体振荡装置、射频模组和电子设备
CN112739052A (zh) * 2020-12-02 2021-04-30 上海伟世通汽车电子系统有限公司 一种pcb板晶振布线方法
CN114040566A (zh) * 2021-11-15 2022-02-11 无锡江南计算技术研究所 一种针对电源模块噪声抑制的pcb电路板

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US20070103246A1 (en) 2007-05-10
US7449969B2 (en) 2008-11-11

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