high-speed-ADC-PCB-layout-guide.zip

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Layout considerations are confusing because there are many differing opinions on the best strategy. include: PDS, decouple,split plane and groud.
high-speed-ADC-PCB-layout-guide.zip
  • high speed ADC PCB layout guide.pdf
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内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6243d9cf0cf57275afa6a696/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6243d9cf0cf57275afa6a696/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y2 ff2 fs1 fc0 sc0 ls1 ws1">AN<span class="ls0 ws0">-</span>1142</div><div class="c x3 y3 w2 h4"><div class="t m0 x4 h3 y4 ff2 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m0 x5 h3 y5 ff2 fs1 fc0 sc0 ls0 ws2">APPLICA<span class="_ _0"></span>TION NOTE<span class="ws0"> </span></div></div><div class="t m0 x6 h5 y6 ff3 fs2 fc0 sc0 ls2 ws3">One<span class="fs3 ls0 ws0"> </span>T<span class="_ _1"></span>ec<span class="_ _2"></span>hnol<span class="_ _2"></span>ogy<span class="fs3 ls0 ws0"> </span><span class="ls3 ws4">Way<span class="_ _2"></span><span class="fs3 ls0 ws0"> <span class="ff4 fs2">&#8226;</span> <span class="_ _3"></span><span class="fs2 ls4 ws5">P.<span class="_ _4"> </span>O<span class="_ _5"></span>.<span class="_ _4"> </span><span class="fs3 ls0 ws0"> </span><span class="ls5 ws6">Box<span class="fs3 ls0 ws0"> </span><span class="ls6 ws7">9106<span class="fs3 ls0 ws0"> <span class="_ _3"></span><span class="ff4 fs2">&#8226;<span class="ff3 fs3"> <span class="_ _3"></span><span class="fs2 ls7 ws8">Norw<span class="_ _1"></span>ood<span class="_ _3"></span>,<span class="fs3 ls0 ws0"> </span><span class="ls8 ws9">MA<span class="_ _3"></span><span class="fs3 ls0 ws0"> <span class="fs2 ls6 ws7">02062</span><span class="fs2">-<span class="ls6 ws7">9106,</span></span> <span class="fs2 ls9 wsa">U<span class="_ _1"></span>.S.A.<span class="fs3 ls0 ws0"> <span class="ff4 fs2">&#8226;<span class="_ _3"></span><span class="ff3 fs3"> <span class="fs2 lsa wsb">T<span class="_ _0"></span>el:<span class="fs3 ls0 ws0"> </span><span class="ls6 ws7">781.329.47<span class="_ _2"></span>00<span class="fs3 ls0 ws0"> <span class="ff4 fs2">&#8226;<span class="_ _3"></span><span class="ff3 fs3"> <span class="fs2 lsb wsc">Fax<span class="_ _2"></span>:<span class="_ _2"></span></span> <span class="fs2 ls6 ws7">781.4<span class="_ _2"></span>61.3113</span> <span class="ff4 fs2">&#8226;<span class="_ _3"></span><span class="ff3 fs3"> <span class="fs2 lsa wsb">ww<span class="_ _2"></span>w<span class="_ _3"></span>.analog.com<span class="ls0 ws0"> </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></div><div class="c x7 y7 w3 h6"><div class="t m0 x8 h7 y8 ff3 fs4 fc0 sc0 ls0 ws0"> </div></div><div class="t m0 x9 h7 y9 ff3 fs4 fc0 sc0 lsc wsd">T<span class="_ _0"></span>ech<span class="_ _3"></span>niques <span class="_ _3"></span>for Hig<span class="_ _1"></span>h Speed AD<span class="_ _3"></span>C PCB La<span class="_ _3"></span>y<span class="_ _3"></span>out <span class="ls0 ws0"> </span></div><div class="t m0 xa h5 ya ff3 fs3 fc0 sc0 ls0 ws0">b<span class="lsd wse">y <span class="lse wsf">Rob Ree<span class="_ _2"></span>der</span></span></div><div class="t m1 xb h5 ya ff3 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m0 x6 h2 yb ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 xc h8 yc ff1 fs5 fc0 sc0 lsf ws10">Rev. <span class="ls0 ws0">0 <span class="ls10 ws11">| P<span class="_ _2"></span>age<span class="_ _2"></span> </span>1 <span class="ls11 ws12">of </span>8 </span></div><div class="t m0 x6 h9 yd ff3 fs6 fc0 sc0 ls0 ws0">INTRODUCTION </div><div class="t m0 x6 ha ye ff5 fs2 fc0 sc0 ls0 ws13">In today&#8217;<span class="_ _0"></span>s industry<span class="_ _1"></span>, the layo<span class="_ _3"></span>ut of the system board has become </div><div class="t m0 x6 ha yf ff5 fs2 fc0 sc0 ls0 ws13">an in<span class="_ _3"></span>tegral part of the design itse<span class="_ _2"></span>lf. Theref<span class="_ _3"></span>ore, i<span class="_ _3"></span>t is <span class="ls12 ws14">of <span class="ls13 ws15">paramo<span class="_ _3"></span>unt </span></span></div><div class="t m0 x6 ha y10 ff5 fs2 fc0 sc0 ls14 ws16">imp<span class="_ _2"></span>or<span class="_ _6"></span>ta<span class="_ _2"></span>n<span class="_ _2"></span>ce<span class="_ _2"></span> <span class="ls15 ws17">that the d<span class="_ _2"></span>esigner has an unde<span class="_ _2"></span>rstanding of the </span></div><div class="t m0 x6 ha y11 ff5 fs2 fc0 sc0 ls16 ws18">me<span class="_ _2"></span>chanis<span class="_ _2"></span>ms t<span class="ls14 ws16">h<span class="_ _2"></span>at<span class="_ _2"></span> <span class="ls17 ws19">affect t<span class="_ _3"></span>he perfo<span class="_ _3"></span>rman<span class="_ _3"></span>ce of<span class="_ _3"></span> <span class="ls0 ws0">a <span class="ls15 ws17">high spe<span class="_ _2"></span>ed</span> signal </span></span></span></div><div class="t m0 x6 ha y12 ff5 fs2 fc0 sc0 ls15 ws1a">chain <span class="ls0 ws0">design. </span></div><div class="t m0 x6 ha y13 ff5 fs2 fc0 sc0 ls17 ws15">Ther<span class="_ _3"></span>e ar<span class="_ _3"></span>e man<span class="_ _3"></span>y <span class="ls12 ws1b">opti<span class="_ _2"></span>ons<span class="_ _2"></span> to<span class="_ _2"></span> cons<span class="_ _2"></span>i<span class="_ _2"></span>d<span class="_ _2"></span>er<span class="_ _2"></span><span class="ls0 ws0"> <span class="ls15 ws1a">whe<span class="_ _2"></span></span><span class="ws13">n it co<span class="_ _3"></span>mes to laying <span class="ws0"> </span></span></span></span></div><div class="t m0 x6 ha y14 ff5 fs2 fc0 sc0 ls12 ws1b">out a<span class="_ _2"></span> <span class="ls18 ws1c">pr<span class="_ _2"></span>i<span class="_ _2"></span>nte<span class="_ _2"></span>d<span class="_ _2"></span> circ<span class="_ _2"></span>u<span class="_ _2"></span>it<span class="_ _2"></span> b<span class="_ _6"></span>oard<span class="_ _2"></span> (<span class="_ _2"></span><span class="ls19 ws1d">PCB<span class="ls0 ws0">) <span class="ls15 ws1a">in</span> <span class="ls15 ws17">a<span class="_ _2"></span> high </span><span class="ws13">spe<span class="_ _2"></span>ed analog signal </span></span></span></span></div><div class="t m0 x6 ha y15 ff5 fs2 fc0 sc0 ls15 ws17">chain design. S<span class="_ _2"></span>ome <span class="ls12 ws14">opti<span class="_ _2"></span>ons<span class="_ _2"></span><span class="ls0 ws0"> <span class="ls1a ws1a">matter more tha<span class="_ _3"></span>n others<span class="ls0 ws0">, <span class="ls13 ws1e">and some </span></span></span></span></span></div><div class="t m0 x6 ha y16 ff5 fs2 fc0 sc0 ls17 ws15">ar<span class="_ _3"></span>e ap<span class="_ _3"></span>plic<span class="_ _3"></span>atio<span class="_ _3"></span>n dependen<span class="_ _1"></span>t.<span class="ls0 ws0"> I<span class="ls1b ws17">n <span class="ls1a ws13">the </span>e<span class="_ _2"></span>nd,</span> <span class="ls1c ws14">th<span class="_ _2"></span>e<span class="_ _2"></span> answe<span class="_ _2"></span><span class="ls1d ws1f">r varie<span class="_ _2"></span>s <span class="ls1e ws20">but</span></span></span> <span class="ls1b ws17">in </span></span></div><div class="t m0 x6 ha y17 ff5 fs2 fc0 sc0 ls0 ws13">all cases the d<span class="_ _2"></span>esigner<span class="ws0"> <span class="ls1d ws1f">should tr<span class="_ _2"></span>y<span class="_ _2"></span> to le<span class="_ _2"></span>an on the error of be<span class="_ _2"></span>st </span></span></div><div class="t m0 x6 ha y18 ff5 fs2 fc0 sc0 ls1a ws1a">practice without <span class="ls1f ws21">bec<span class="_ _3"></span>om<span class="_ _3"></span>ing<span class="_ _3"></span><span class="ls0 ws0"> <span class="ls1d ws1f">overly criti<span class="_ _2"></span>cal</span> <span class="ls18 ws1b">re<span class="_ _2"></span>g<span class="_ _2"></span>ard<span class="_ _2"></span>i<span class="_ _2"></span>ng<span class="_ _2"></span></span> <span class="ls12 ws1b">e<span class="_ _2"></span>ve<span class="_ _2"></span>r<span class="_ _2"></span>y<span class="_ _2"></span> layou<span class="_ _2"></span>t </span></span></span></div><div class="t m0 x6 ha y19 ff5 fs2 fc0 sc0 ls15 ws17">detail. This applicatio<span class="_ _3"></span>n note<span class="ls0 ws0"> <span class="ls17 ws22">pr<span class="_ _3"></span>ovides<span class="ls0 ws0"> <span class="ls1d ws23">inform<span class="ls14 wsb">ati<span class="_ _2"></span>on<span class="_ _2"></span> t<span class="_ _2"></span>h<span class="_ _2"></span>at m<span class="_ _2"></span>a<span class="_ _2"></span>y b<span class="_ _2"></span>e<span class="_ _2"></span> </span></span></span></span></span></div><div class="t m0 x6 ha y1a ff5 fs2 fc0 sc0 ls0 ws13">useful whe<span class="_ _2"></span>n starting <span class="ls15 ws1a">the</span><span class="ws0"> <span class="ls1d ws23">next<span class="_ _2"></span></span> <span class="ls15 ws17">hig<span class="_ _2"></span>h speed<span class="_ _2"></span> design.</span> </span></div><div class="t m0 x6 h9 y1b ff3 fs6 fc0 sc0 ls0 ws24">EXPOSED P<span class="_ _1"></span>ADDLE<span class="_ _3"></span>S<span class="ws0"> </span></div><div class="t m0 x6 ha y1c ff5 fs2 fc0 sc0 ls1d ws1c">Expos<span class="_ _2"></span>ed pa<span class="_ _2"></span>d<span class="ls0 ws0">dle<span class="ws13">s, or <span class="ls20 ws25">E<span class="_ _5"></span>PA<span class="_ _6"></span>D<span class="_ _5"></span></span></span>s, <span class="ls12 ws1b">are<span class="_ _6"></span> som<span class="_ _2"></span>e<span class="_ _2"></span>ti<span class="_ _2"></span>me<span class="_ _2"></span>s<span class="_ _2"></span> ove<span class="_ _2"></span>rl<span class="_ _2"></span>o<span class="_ _2"></span>oke<span class="_ _2"></span>d;<span class="_ _2"></span> how<span class="_ _2"></span></span>-</span></div><div class="t m0 x6 ha y1d ff5 fs2 fc0 sc0 ls21 ws26">e<span class="_ _6"></span>v<span class="_ _6"></span>e<span class="_ _6"></span>r,<span class="_ _6"></span><span class="ls0 ws0"> <span class="ls18 ws1c">t<span class="_ _2"></span>he<span class="_ _6"></span>y are<span class="_ _2"></span></span> <span class="ls17 ws22">essen<span class="_ _3"></span>tial <span class="ls1a ws13">to<span class="ls0 ws0"> </span><span class="ws1a">getting the most performance out <span class="ls0 ws0"> </span></span></span></span></span></div><div class="t m0 x6 ha y1e ff5 fs2 fc0 sc0 ls12 ws14">of <span class="ls15 ws17">the si<span class="_ _2"></span>gnal chain <span class="ls0 ws13">as well as<span class="ws0"> </span></span><span class="ws14">getting the <span class="ls1d ws23">most <span class="ls1a ws1a">heat out o<span class="_ _3"></span>f <span class="ls0 ws0"> </span></span></span></span></span></div><div class="t m0 x6 ha y1f ff5 fs2 fc0 sc0 ls17 ws15">the device.<span class="_ _3"></span><span class="ls0 ws0"> </span></div><div class="t m0 x6 ha y20 ff5 fs2 fc0 sc0 ls15 ws17">The e<span class="ls1d ws1f">xp<span class="_ _2"></span>ose<span class="_ _2"></span>d pad<span class="ls0 ws0">d<span class="_ _2"></span>le, <span class="ls17 ws15">ref<span class="_ _3"></span>err<span class="_ _3"></span>ed to a<span class="_ _3"></span>t Analo<span class="_ _3"></span>g Device<span class="ls0 ws13">s, Inc., as<span class="ws0"> </span></span></span></span></span></div><div class="t m0 x6 ha y21 ff5 fs2 fc0 sc0 ls0 ws0">P<span class="ws13">in 0, is the paddle found underneath most pa<span class="_ _3"></span>rts to<span class="_ _2"></span>day<span class="_ _0"></span>. This <span class="_ _2"></span><span class="ws0"> </span></span></div><div class="t m0 x6 ha y22 ff5 fs2 fc0 sc0 ls12 ws1b">is<span class="_ _2"></span> an i<span class="_ _2"></span>mp<span class="_ _2"></span>or<span class="_ _2"></span>ta<span class="_ _2"></span>nt <span class="_ _2"></span>conn<span class="_ _2"></span>e<span class="_ _2"></span>c<span class="_ _2"></span>ti<span class="_ _2"></span>on<span class="_ _2"></span><span class="ls0 ws0"> <span class="ls1c ws14">b<span class="_ _2"></span>e<span class="_ _2"></span>ca<span class="_ _2"></span>us<span class="_ _2"></span>e<span class="_ _2"></span> it</span> <span class="ws13">tie<span class="_ _2"></span>s all in<span class="_ _3"></span>ternal grounds </span></span></div><div class="t m0 xd ha y23 ff5 fs2 fc0 sc0 ls1a ws1a">from the die to a central point under the part. Note the<span class="ls0 ws0"> <span class="ls22 ws1d">lack of </span></span></div><div class="t m0 xd ha y24 ff5 fs2 fc0 sc0 ls1b ws23">ground pins in many <span class="ls16 ws18">con<span class="_ _3"></span>ver<span class="_ _2"></span>te<span class="_ _2"></span>rs and<span class="_ _2"></span> amplif<span class="_ _2"></span>ie<span class="_ _2"></span>rs to<span class="_ _2"></span>day<span class="_ _1"></span>.<span class="_ _2"></span><span class="ls0 ws0"> <span class="ls15 ws1a">The </span></span></span></div><div class="t m0 xd ha y25 ff5 fs2 fc0 sc0 ls20 ws25">E<span class="_ _5"></span>PA<span class="_ _5"></span>D<span class="_ _6"></span><span class="ls0 ws0"> <span class="ls15 ws1a">is <span class="ls17 ws15">the reaso<span class="_ _3"></span>n why<span class="_ _0"></span><span class="ls0 ws0">. </span></span></span></span></div><div class="t m0 xd ha y26 ff5 fs2 fc0 sc0 ls15 ws17">The key is to tie<span class="_ _2"></span> this pin <span class="ls12 ws14">dow<span class="_ _2"></span>n,<span class="_ _2"></span> </span>t<span class="_ _2"></span>hat is,<span class="ls0 ws0"> <span class="ls17 ws22">sol<span class="_ _3"></span>dered<span class="ls0 ws0"> <span class="ls1a ws1a">w<span class="_ _3"></span>ell to the <span class="_ _2"></span><span class="ls19 ws1d">PCB<span class="ls0 ws0"> </span></span></span></span></span></span></div><div class="t m0 xd ha y27 ff5 fs2 fc0 sc0 ls13 ws1e">to mak<span class="_ _3"></span>e a rob<span class="_ _3"></span>ust electr<span class="_ _3"></span>ical and thermal c<span class="_ _3"></span>onn<span class="_ _3"></span>ection. <span class="ls15 ws17">When this </span></div><div class="t m0 xd ha y28 ff5 fs2 fc0 sc0 ls1b ws23">connection is not s<span class="_ _2"></span>olid, havoc can o<span class="_ _2"></span>ccur<span class="_ _1"></span>. In ot<span class="_ _2"></span>her words, the </div><div class="t m0 xd ha y29 ff5 fs2 fc0 sc0 ls1b ws23">design m<span class="_ _2"></span>ay not w<span class="_ _3"></span>ork<span class="ls0 ws0">. </span></div><div class="t m0 xd h5 y2a ff6 fs3 fc0 sc0 ls0 ws27">Achieving the <span class="_ _2"></span><span class="lsd ws28">Bes<span class="_ _2"></span>t Conne<span class="_ _2"></span>cti<span class="_ _2"></span>on<span class="_ _2"></span></span><span class="ws0"> </span></div><div class="t m0 xd ha y2b ff5 fs2 fc0 sc0 ls17 ws15">Ther<span class="_ _3"></span>e ar<span class="_ _3"></span>e thr<span class="_ _3"></span>ee <span class="ls15 ws1a">basic <span class="ls1a">ste<span class="_ _2"></span>ps to take </span><span class="ws17">to achieve<span class="ls0 ws0"> <span class="_ _2"></span></span></span><span class="ls1a">the best con<span class="ls0 ws0">-</span></span></span></div><div class="t m0 xd ha y2c ff5 fs2 fc0 sc0 ls1a ws1a">nection, elec<span class="_ _2"></span>trically and therma<span class="_ _2"></span>lly<span class="_ _1"></span>, with the <span class="ls20 ws25">E<span class="_ _5"></span>PA<span class="_ _5"></span>D<span class="_ _6"></span><span class="ls0 ws13">. First, if </span></span></div><div class="t m0 xd ha y2d ff5 fs2 fc0 sc0 ls0 ws13">possible, rep<span class="_ _3"></span>licate the <span class="ls20 ws25">E<span class="_ _6"></span>PA<span class="_ _5"> </span>D<span class="_ _5"></span></span><span class="ws0"> <span class="ls19 ws8">on <span class="_ _2"></span>each PC<span class="_ _2"></span>B layer<span class="_ _1"></span>.<span class="_ _2"></span> <span class="ls12 ws1b">D<span class="_ _2"></span>oi<span class="_ _2"></span>ng s<span class="_ _2"></span>o<span class="_ _2"></span><span class="ls0 ws0"> </span></span></span></span></div><div class="t m0 xd ha y2e ff5 fs2 fc0 sc0 ls14 ws16">cre<span class="_ _2"></span>at<span class="_ _2"></span>e<span class="_ _2"></span><span class="ls0 ws0">s <span class="ls13 ws1e">a thick ther<span class="_ _3"></span>mal connectio<span class="_ _3"></span>n to all gro<span class="_ _3"></span>unds a<span class="_ _3"></span>nd gro<span class="_ _3"></span>und </span></span></div><div class="t m0 xd ha y2f ff5 fs2 fc0 sc0 ls1d ws1f">layers so <span class="ls1a ws13">that <span class="ls15 ws17">the heat can dissipate and spr<span class="_ _3"></span>ead<span class="_ _2"></span> out q<span class="_ _3"></span>uickly<span class="_ _1"></span>. This </span></span></div><div class="t m0 xd ha y30 ff5 fs2 fc0 sc0 ls15 ws17">is per<span class="_ _2"></span>tinent for high power parts and for app<span class="_ _3"></span>lications that hav<span class="_ _3"></span>e </div><div class="t m0 xd ha y31 ff5 fs2 fc0 sc0 ls15 ws17">high channel counts. Elect<span class="_ _2"></span>rical<span class="_ _2"></span>ly<span class="_ _1"></span><span class="ls0 ws0">, <span class="ws13">this gives a good equal con</span>-</span></div><div class="t m0 xd ha y32 ff5 fs2 fc0 sc0 ls0 ws13">nection to all the ground lay<span class="_ _3"></span>ers. <span class="ws0"> </span></div><div class="t m0 xd ha y33 ff5 fs2 fc0 sc0 ls1b ws17">One<span class="ls0 ws0"> <span class="ls17 ws15">can even r<span class="_ _1"></span>eplica<span class="_ _3"></span>te the<span class="ls0 ws0"> <span class="ls20 ws25">E<span class="_ _6"></span>PA<span class="_ _5"> </span>D<span class="_ _5"></span></span> <span class="ls12 ws1b">on<span class="_ _2"></span> th<span class="_ _2"></span>e b<span class="_ _6"></span>ottom<span class="_ _2"></span> la<span class="_ _2"></span>yer<span class="_ _2"></span></span> (</span><span class="ws22">see </span></span></span></div><div class="t m0 xd ha y34 ff5 fs2 fc0 sc0 ls18 ws1b">Fig<span class="_ _2"></span>u<span class="_ _2"></span>re <span class="ls0 ws0">1)<span class="ws13">. This can ser<span class="_ _2"></span>ve as a th<span class="_ _2"></span>ermal relief gro<span class="_ _3"></span>und point fo<span class="_ _3"></span>r </span></span></div><div class="t m0 xd ha y35 ff5 fs2 fc0 sc0 ls13 ws1e">deco<span class="_ _3"></span>uplin<span class="_ _3"></span>g and a p<span class="_ _3"></span>laceho<span class="_ _3"></span>lder to a<span class="_ _3"></span>ttac<span class="_ _3"></span>h a hea<span class="_ _3"></span>t sink on the </div><div class="t m0 xd ha y36 ff5 fs2 fc0 sc0 ls12 ws1b">b<span class="_ _2"></span>ottom<span class="_ _2"></span> si<span class="_ _2"></span>d<span class="_ _2"></span>e.<span class="_ _2"></span><span class="ls0 ws0"> </span></div><div class="c xe y37 w4 hb"><div class="t m2 xf hc y38 ff7 fs7 fc0 sc0 ls23 ws29">ADC</div><div class="t m2 x10 hc y39 ff7 fs7 fc0 sc0 ls23 ws2a">DECO<span class="_ _2"></span>UPLI<span class="_ _2"></span>NG<span class="_ _2"></span> CA<span class="ls0 ws0">P</span></div><div class="t m3 x11 hd y3a ff8 fs8 fc0 sc0 ls24 ws2b">10484-001</div><div class="t m2 x12 hc y3b ff7 fs7 fc0 sc0 ls23 ws2a">DECO<span class="_ _2"></span>UPLI<span class="_ _2"></span>NG<span class="_ _2"></span> CA<span class="ls0 ws0">P</span></div><div class="t m2 x13 hc y3c ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ls23 ws2a">YE<span class="_ _2"></span>R 1 -<span class="_"> </span><span class="ls0 ws0">TOP<span class="ls25"> S<span class="_ _3"></span>IGNA<span class="_ _3"></span><span class="ls0">L</span></span></span></span></div><div class="t m2 x14 hc y3d ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ls23 ws2a">YE<span class="_ _2"></span>R 2 - G<span class="_ _2"></span>ROUND1</span></div><div class="t m2 x15 hc y3e ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ws29">YER 3 - POWER1</span></div><div class="t m2 x14 hc y3f ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ls23 ws2a">YE<span class="_ _2"></span>R 5 - G<span class="_ _2"></span>ROUND2</span></div><div class="t m2 x0 hc y40 ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ls23 ws2a">YE<span class="_ _2"></span>R 6 - BO<span class="_ _2"></span>T<span class="ls0 ws0">T<span class="ls25">OM S<span class="_ _3"></span>IGNA<span class="_ _1"></span><span class="ls0">L</span></span></span></span></div><div class="t m2 x15 hc y41 ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span><span class="ws29">YER 4 - POWER2</span></div><div class="t m2 x16 hc y42 ff7 fs7 fc0 sc0 ls25 ws2c">DIE<span class="_ _3"></span>LECTR<span class="_ _3"></span>IC</div><div class="t m2 x16 hc y43 ff7 fs7 fc0 sc0 ls0 ws0">LA<span class="_ _1"></span>YERS</div><div class="t m2 x17 hc y44 ff7 fs7 fc0 sc0 ls0 ws0">EP<span class="_ _1"></span><span class="ls23 ws29">AD</span></div><div class="t m2 x17 hc y45 ff7 fs7 fc0 sc0 ls0 ws0">EP<span class="_ _1"></span><span class="ls23 ws29">AD</span></div><div class="t m2 x17 hc y46 ff7 fs7 fc0 sc0 ls0 ws0">EP<span class="_ _1"></span><span class="ls23 ws29">AD</span></div><div class="t m2 x17 hc y47 ff7 fs7 fc0 sc0 ls0 ws0">EP<span class="_ _1"></span><span class="ls23 ws29">AD</span></div><div class="t m2 x18 hc y48 ff7 fs7 fc0 sc0 ls23 ws29">VI<span class="_ _2"></span>AS</div></div><div class="t m0 x19 he y49 ff9 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1a he y4a ff9 fs0 fc0 sc0 ls26 ws2d">Figure <span class="ls0 ws0">1<span class="ls27">. Exposed P</span><span class="ws2e">ad Layer Layout Ex</span></span>ample<span class="ls0 ws0"> </span></div><div class="t m0 x6 ha y4b ff5 fs2 fc0 sc0 ls0 ws0"> </div><div class="t m0 x6 ha y4c ff5 fs2 fc0 sc0 ls0 ws0"> </div><a class="l" rel='nofollow' onclick='return false;'><div class="d m4"></div></a><a class="l" rel='nofollow' onclick='return false;'><div class="d m4"></div></a></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>
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